/*
 * jQuery Form Plugin
 * version: 2.28 (10-MAY-2009)
 * @requires jQuery v1.2.2 or later
 *
 * Examples and documentation at: http://malsup.com/jquery/form/
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */
;(function($) {

/*
    Usage Note:
    -----------
    Do not use both ajaxSubmit and ajaxForm on the same form.  These
    functions are intended to be exclusive.  Use ajaxSubmit if you want
    to bind your own submit handler to the form.  For example,

    $(document).ready(function() {
        $('#myForm').bind('submit', function() {
            $(this).ajaxSubmit({
                target: '#output'
            });
            return false; // <-- important!
        });
    });

    Use ajaxForm when you want the plugin to manage all the event binding
    for you.  For example,

    $(document).ready(function() {
        $('#myForm').ajaxForm({
            target: '#output'
        });
    });

    When using ajaxForm, the ajaxSubmit function will be invoked for you
    at the appropriate time.
*/

/**
 * ajaxSubmit() provides a mechanism for immediately submitting
 * an HTML form using AJAX.
 */
$.fn.ajaxSubmit = function(options) {
    // fast fail if nothing selected (http://dev.jquery.com/ticket/2752)
    if (!this.length) {
        log('ajaxSubmit: skipping submit process - no element selected');
        return this;
    }

    if (typeof options == 'function')
        options = { success: options };

    var url = $.trim(this.attr('action'));
    if (url) {
	    // clean url (don't include hash vaue)
	    url = (url.match(/^([^#]+)/)||[])[1];
   	}
   	url = url || window.location.href || ''

    options = $.extend({
        url:  url,
        type: this.attr('method') || 'GET'
    }, options || {});

    // hook for manipulating the form data before it is extracted;
    // convenient for use with rich editors like tinyMCE or FCKEditor
    var veto = {};
    this.trigger('form-pre-serialize', [this, options, veto]);
    if (veto.veto) {
        log('ajaxSubmit: submit vetoed via form-pre-serialize trigger');
        return this;
    }

    // provide opportunity to alter form data before it is serialized
    if (options.beforeSerialize && options.beforeSerialize(this, options) === false) {
        log('ajaxSubmit: submit aborted via beforeSerialize callback');
        return this;
    }

    var a = this.formToArray(options.semantic);
    if (options.data) {
        options.extraData = options.data;
        for (var n in options.data) {
          if(options.data[n] instanceof Array) {
            for (var k in options.data[n])
              a.push( { name: n, value: options.data[n][k] } );
          }
          else
             a.push( { name: n, value: options.data[n] } );
        }
    }

    // give pre-submit callback an opportunity to abort the submit
    if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) {
        log('ajaxSubmit: submit aborted via beforeSubmit callback');
        return this;
    }

    // fire vetoable 'validate' event
    this.trigger('form-submit-validate', [a, this, options, veto]);
    if (veto.veto) {
        log('ajaxSubmit: submit vetoed via form-submit-validate trigger');
        return this;
    }

    var q = $.param(a);

    if (options.type.toUpperCase() == 'GET') {
        options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q;
        options.data = null;  // data is null for 'get'
    }
    else
        options.data = q; // data is the query string for 'post'

    var $form = this, callbacks = [];
    if (options.resetForm) callbacks.push(function() { $form.resetForm(); });
    if (options.clearForm) callbacks.push(function() { $form.clearForm(); });

    // perform a load on the target only if dataType is not provided
    if (!options.dataType && options.target) {
        var oldSuccess = options.success || function(){};
        callbacks.push(function(data) {
            $(options.target).html(data).each(oldSuccess, arguments);
        });
    }
    else if (options.success)
        callbacks.push(options.success);

    options.success = function(data, status) {
        for (var i=0, max=callbacks.length; i < max; i++)
            callbacks[i].apply(options, [data, status, $form]);
    };

    // are there files to upload?
    var files = $('input:file', this).fieldValue();
    var found = false;
    for (var j=0; j < files.length; j++)
        if (files[j])
            found = true;

	var multipart = false;
//	var mp = 'multipart/form-data';
//	multipart = ($form.attr('enctype') == mp || $form.attr('encoding') == mp);

    // options.iframe allows user to force iframe mode
   if (options.iframe || found || multipart) {
       // hack to fix Safari hang (thanks to Tim Molendijk for this)
       // see:  http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d
       if (options.closeKeepAlive)
           $.get(options.closeKeepAlive, fileUpload);
       else
           fileUpload();
       }
   else
       $.ajax(options);

    // fire 'notify' event
    this.trigger('form-submit-notify', [this, options]);
    return this;


    // private function for handling file uploads (hat tip to YAHOO!)
    function fileUpload() {
        var form = $form[0];

        if ($(':input[name=submit]', form).length) {
            alert('Error: Form elements must not be named "submit".');
            return;
        }

        var opts = $.extend({}, $.ajaxSettings, options);
		var s = $.extend(true, {}, $.extend(true, {}, $.ajaxSettings), opts);

        var id = 'jqFormIO' + (new Date().getTime());
        var $io = $('<iframe id="' + id + '" name="' + id + '" src="about:blank" />');
        var io = $io[0];

        $io.css({ position: 'absolute', top: '-1000px', left: '-1000px' });

        var xhr = { // mock object
            aborted: 0,
            responseText: null,
            responseXML: null,
            status: 0,
            statusText: 'n/a',
            getAllResponseHeaders: function() {},
            getResponseHeader: function() {},
            setRequestHeader: function() {},
            abort: function() {
                this.aborted = 1;
                $io.attr('src','about:blank'); // abort op in progress
            }
        };

        var g = opts.global;
        // trigger ajax global events so that activity/block indicators work like normal
        if (g && ! $.active++) $.event.trigger("ajaxStart");
        if (g) $.event.trigger("ajaxSend", [xhr, opts]);

		if (s.beforeSend && s.beforeSend(xhr, s) === false) {
			s.global && $.active--;
			return;
        }
        if (xhr.aborted)
            return;

        var cbInvoked = 0;
        var timedOut = 0;

        // add submitting element to data if we know it
        var sub = form.clk;
        if (sub) {
            var n = sub.name;
            if (n && !sub.disabled) {
                options.extraData = options.extraData || {};
                options.extraData[n] = sub.value;
                if (sub.type == "image") {
                    options.extraData[name+'.x'] = form.clk_x;
                    options.extraData[name+'.y'] = form.clk_y;
                }
            }
        }

        // take a breath so that pending repaints get some cpu time before the upload starts
        setTimeout(function() {
            // make sure form attrs are set
            var t = $form.attr('target'), a = $form.attr('action');

			// update form attrs in IE friendly way
			form.setAttribute('target',id);
			if (form.getAttribute('method') != 'POST')
				form.setAttribute('method', 'POST');
			if (form.getAttribute('action') != opts.url)
				form.setAttribute('action', opts.url);

            // ie borks in some cases when setting encoding
            if (! options.skipEncodingOverride) {
                $form.attr({
                    encoding: 'multipart/form-data',
                    enctype:  'multipart/form-data'
                });
            }

            // support timout
            if (opts.timeout)
                setTimeout(function() { timedOut = true; cb(); }, opts.timeout);

            // add "extra" data to form if provided in options
            var extraInputs = [];
            try {
                if (options.extraData)
                    for (var n in options.extraData)
                        extraInputs.push(
                            $('<input type="hidden" name="'+n+'" value="'+options.extraData[n]+'" />')
                                .appendTo(form)[0]);

                // add iframe to doc and submit the form
                $io.appendTo('body');
                io.attachEvent ? io.attachEvent('onload', cb) : io.addEventListener('load', cb, false);
                form.submit();
            }
            finally {
                // reset attrs and remove "extra" input elements
				form.setAttribute('action',a);
                t ? form.setAttribute('target', t) : $form.removeAttr('target');
                $(extraInputs).remove();
            }
        }, 10);

        var nullCheckFlag = 0;

        function cb() {
            if (cbInvoked++) return;

            io.detachEvent ? io.detachEvent('onload', cb) : io.removeEventListener('load', cb, false);

            var ok = true;
            try {
                if (timedOut) throw 'timeout';
                // extract the server response from the iframe
                var data, doc;

                doc = io.contentWindow ? io.contentWindow.document : io.contentDocument ? io.contentDocument : io.document;

                if ((doc.body == null || doc.body.innerHTML == '') && !nullCheckFlag) {
                    // in some browsers (cough, Opera 9.2.x) the iframe DOM is not always traversable when
                    // the onload callback fires, so we give them a 2nd chance
                    nullCheckFlag = 1;
                    cbInvoked--;
                    setTimeout(cb, 100);
                    return;
                }

                xhr.responseText = doc.body ? doc.body.innerHTML : null;
                xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;
                xhr.getResponseHeader = function(header){
                    var headers = {'content-type': opts.dataType};
                    return headers[header];
                };

                if (opts.dataType == 'json' || opts.dataType == 'script') {
                    var ta = doc.getElementsByTagName('textarea')[0];
                    xhr.responseText = ta ? ta.value : xhr.responseText;
                }
                else if (opts.dataType == 'xml' && !xhr.responseXML && xhr.responseText != null) {
                    xhr.responseXML = toXml(xhr.responseText);
                }
                data = $.httpData(xhr, opts.dataType);
            }
            catch(e){
                ok = false;
                $.handleError(opts, xhr, 'error', e);
            }

            // ordering of these callbacks/triggers is odd, but that's how $.ajax does it
            if (ok) {
                opts.success(data, 'success');
                if (g) $.event.trigger("ajaxSuccess", [xhr, opts]);
            }
            if (g) $.event.trigger("ajaxComplete", [xhr, opts]);
            if (g && ! --$.active) $.event.trigger("ajaxStop");
            if (opts.complete) opts.complete(xhr, ok ? 'success' : 'error');

            // clean up
            setTimeout(function() {
                $io.remove();
                xhr.responseXML = null;
            }, 100);
        };

        function toXml(s, doc) {
            if (window.ActiveXObject) {
                doc = new ActiveXObject('Microsoft.XMLDOM');
                doc.async = 'false';
                doc.loadXML(s);
            }
            else
                doc = (new DOMParser()).parseFromString(s, 'text/xml');
            return (doc && doc.documentElement && doc.documentElement.tagName != 'parsererror') ? doc : null;
        };
    };
};

/**
 * ajaxForm() provides a mechanism for fully automating form submission.
 *
 * The advantages of using this method instead of ajaxSubmit() are:
 *
 * 1: This method will include coordinates for <input type="image" /> elements (if the element
 *    is used to submit the form).
 * 2. This method will include the submit element's name/value data (for the element that was
 *    used to submit the form).
 * 3. This method binds the submit() method to the form for you.
 *
 * The options argument for ajaxForm works exactly as it does for ajaxSubmit.  ajaxForm merely
 * passes the options argument along after properly binding events for submit elements and
 * the form itself.
 */
$.fn.ajaxForm = function(options) {
    return this.ajaxFormUnbind().bind('submit.form-plugin',function() {
        $(this).ajaxSubmit(options);
        return false;
    }).each(function() {
        // store options in hash
        $(":submit,input:image", this).bind('click.form-plugin',function(e) {
            var form = this.form;
            form.clk = this;
            if (this.type == 'image') {
                if (e.offsetX != undefined) {
                    form.clk_x = e.offsetX;
                    form.clk_y = e.offsetY;
                } else if (typeof $.fn.offset == 'function') { // try to use dimensions plugin
                    var offset = $(this).offset();
                    form.clk_x = e.pageX - offset.left;
                    form.clk_y = e.pageY - offset.top;
                } else {
                    form.clk_x = e.pageX - this.offsetLeft;
                    form.clk_y = e.pageY - this.offsetTop;
                }
            }
            // clear form vars
            setTimeout(function() { form.clk = form.clk_x = form.clk_y = null; }, 10);
        });
    });
};

// ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm
$.fn.ajaxFormUnbind = function() {
    this.unbind('submit.form-plugin');
    return this.each(function() {
        $(":submit,input:image", this).unbind('click.form-plugin');
    });

};

/**
 * formToArray() gathers form element data into an array of objects that can
 * be passed to any of the following ajax functions: $.get, $.post, or load.
 * Each object in the array has both a 'name' and 'value' property.  An example of
 * an array for a simple login form might be:
 *
 * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
 *
 * It is this array that is passed to pre-submit callback functions provided to the
 * ajaxSubmit() and ajaxForm() methods.
 */
$.fn.formToArray = function(semantic) {
    var a = [];
    if (this.length == 0) return a;

    var form = this[0];
    var els = semantic ? form.getElementsByTagName('*') : form.elements;
    if (!els) return a;
    for(var i=0, max=els.length; i < max; i++) {
        var el = els[i];
        var n = el.name;
        if (!n) continue;

        if (semantic && form.clk && el.type == "image") {
            // handle image inputs on the fly when semantic == true
            if(!el.disabled && form.clk == el) {
            	a.push({name: n, value: $(el).val()});
                a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
            }
            continue;
        }

        var v = $.fieldValue(el, true);
        if (v && v.constructor == Array) {
            for(var j=0, jmax=v.length; j < jmax; j++)
                a.push({name: n, value: v[j]});
        }
        else if (v !== null && typeof v != 'undefined')
            a.push({name: n, value: v});
    }

    if (!semantic && form.clk) {
        // input type=='image' are not found in elements array! handle it here
        var $input = $(form.clk), input = $input[0], n = input.name;
        if (n && !input.disabled && input.type == 'image') {
        	a.push({name: n, value: $input.val()});
            a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
        }
    }
    return a;
};

/**
 * Serializes form data into a 'submittable' string. This method will return a string
 * in the format: name1=value1&amp;name2=value2
 */
$.fn.formSerialize = function(semantic) {
    //hand off to jQuery.param for proper encoding
    return $.param(this.formToArray(semantic));
};

/**
 * Serializes all field elements in the jQuery object into a query string.
 * This method will return a string in the format: name1=value1&amp;name2=value2
 */
$.fn.fieldSerialize = function(successful) {
    var a = [];
    this.each(function() {
        var n = this.name;
        if (!n) return;
        var v = $.fieldValue(this, successful);
        if (v && v.constructor == Array) {
            for (var i=0,max=v.length; i < max; i++)
                a.push({name: n, value: v[i]});
        }
        else if (v !== null && typeof v != 'undefined')
            a.push({name: this.name, value: v});
    });
    //hand off to jQuery.param for proper encoding
    return $.param(a);
};

/**
 * Returns the value(s) of the element in the matched set.  For example, consider the following form:
 *
 *  <form><fieldset>
 *      <input name="A" type="text" />
 *      <input name="A" type="text" />
 *      <input name="B" type="checkbox" value="B1" />
 *      <input name="B" type="checkbox" value="B2"/>
 *      <input name="C" type="radio" value="C1" />
 *      <input name="C" type="radio" value="C2" />
 *  </fieldset></form>
 *
 *  var v = $(':text').fieldValue();
 *  // if no values are entered into the text inputs
 *  v == ['','']
 *  // if values entered into the text inputs are 'foo' and 'bar'
 *  v == ['foo','bar']
 *
 *  var v = $(':checkbox').fieldValue();
 *  // if neither checkbox is checked
 *  v === undefined
 *  // if both checkboxes are checked
 *  v == ['B1', 'B2']
 *
 *  var v = $(':radio').fieldValue();
 *  // if neither radio is checked
 *  v === undefined
 *  // if first radio is checked
 *  v == ['C1']
 *
 * The successful argument controls whether or not the field element must be 'successful'
 * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
 * The default value of the successful argument is true.  If this value is false the value(s)
 * for each element is returned.
 *
 * Note: This method *always* returns an array.  If no valid value can be determined the
 *       array will be empty, otherwise it will contain one or more values.
 */
$.fn.fieldValue = function(successful) {
    for (var val=[], i=0, max=this.length; i < max; i++) {
        var el = this[i];
        var v = $.fieldValue(el, successful);
        if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length))
            continue;
        v.constructor == Array ? $.merge(val, v) : val.push(v);
    }
    return val;
};

/**
 * Returns the value of the field element.
 */
$.fieldValue = function(el, successful) {
    var n = el.name, t = el.type, tag = el.tagName.toLowerCase();
    if (typeof successful == 'undefined') successful = true;

    if (successful && (!n || el.disabled || t == 'reset' || t == 'button' ||
        (t == 'checkbox' || t == 'radio') && !el.checked ||
        (t == 'submit' || t == 'image') && el.form && el.form.clk != el ||
        tag == 'select' && el.selectedIndex == -1))
            return null;

    if (tag == 'select') {
        var index = el.selectedIndex;
        if (index < 0) return null;
        var a = [], ops = el.options;
        var one = (t == 'select-one');
        var max = (one ? index+1 : ops.length);
        for(var i=(one ? index : 0); i < max; i++) {
            var op = ops[i];
            if (op.selected) {
				var v = op.value;
				if (!v) // extra pain for IE...
                	v = (op.attributes && op.attributes['value'] && !(op.attributes['value'].specified)) ? op.text : op.value;
                if (one) return v;
                a.push(v);
            }
        }
        return a;
    }
    return el.value;
};

/**
 * Clears the form data.  Takes the following actions on the form's input fields:
 *  - input text fields will have their 'value' property set to the empty string
 *  - select elements will have their 'selectedIndex' property set to -1
 *  - checkbox and radio inputs will have their 'checked' property set to false
 *  - inputs of type submit, button, reset, and hidden will *not* be effected
 *  - button elements will *not* be effected
 */
$.fn.clearForm = function() {
    return this.each(function() {
        $('input,select,textarea', this).clearFields();
    });
};

/**
 * Clears the selected form elements.
 */
$.fn.clearFields = $.fn.clearInputs = function() {
    return this.each(function() {
        var t = this.type, tag = this.tagName.toLowerCase();
        if (t == 'text' || t == 'password' || tag == 'textarea')
            this.value = '';
        else if (t == 'checkbox' || t == 'radio')
            this.checked = false;
        else if (tag == 'select')
            this.selectedIndex = -1;
    });
};

/**
 * Resets the form data.  Causes all form elements to be reset to their original value.
 */
$.fn.resetForm = function() {
    return this.each(function() {
        // guard against an input with the name of 'reset'
        // note that IE reports the reset function as an 'object'
        if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType))
            this.reset();
    });
};

/**
 * Enables or disables any matching elements.
 */
$.fn.enable = function(b) {
    if (b == undefined) b = true;
    return this.each(function() {
        this.disabled = !b;
    });
};

/**
 * Checks/unchecks any matching checkboxes or radio buttons and
 * selects/deselects and matching option elements.
 */
$.fn.selected = function(select) {
    if (select == undefined) select = true;
    return this.each(function() {
        var t = this.type;
        if (t == 'checkbox' || t == 'radio')
            this.checked = select;
        else if (this.tagName.toLowerCase() == 'option') {
            var $sel = $(this).parent('select');
            if (select && $sel[0] && $sel[0].type == 'select-one') {
                // deselect all other options
                $sel.find('option').selected(false);
            }
            this.selected = select;
        }
    });
};

// helper fn for console logging
// set $.fn.ajaxSubmit.debug to true to enable debug logging
function log() {
    if ($.fn.ajaxSubmit.debug && window.console && window.console.log)
        window.console.log('[jquery.form] ' + Array.prototype.join.call(arguments,''));
};

})(jQuery);


/**
 * jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget.
 * @requires jQuery v1.2 or above
 *
 * http://gmarwaha.com/jquery/jcarousellite/
 *
 * Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * Version: 1.0.1
 * Note: Requires jquery 1.2 or above from version 1.0.1
 */

/**
 * Creates a carousel-style navigation widget for images/any-content from a simple HTML markup.
 *
 * The HTML markup that is used to build the carousel can be as simple as...
 *
 *  <div class="carousel">
 *      <ul>
 *          <li><img src="image/1.jpg" alt="1"></li>
 *          <li><img src="image/2.jpg" alt="2"></li>
 *          <li><img src="image/3.jpg" alt="3"></li>
 *      </ul>
 *  </div>
 *
 * As you can see, this snippet is nothing but a simple div containing an unordered list of images.
 * You don't need any special "class" attribute, or a special "css" file for this plugin.
 * I am using a class attribute just for the sake of explanation here.
 *
 * To navigate the elements of the carousel, you need some kind of navigation buttons.
 * For example, you will need a "previous" button to go backward, and a "next" button to go forward.
 * This need not be part of the carousel "div" itself. It can be any element in your page.
 * Lets assume that the following elements in your document can be used as next, and prev buttons...
 *
 * <button class="prev">&lt;&lt;</button>
 * <button class="next">&gt;&gt;</button>
 *
 * Now, all you need to do is call the carousel component on the div element that represents it, and pass in the
 * navigation buttons as options.
 *
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev"
 * });
 *
 * That's it, you would have now converted your raw div, into a magnificient carousel.
 *
 * There are quite a few other options that you can use to customize it though.
 * Each will be explained with an example below.
 *
 * @param an options object - You can specify all the options shown below as an options object param.
 *
 * @option btnPrev, btnNext : string - no defaults
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev"
 * });
 * @desc Creates a basic carousel. Clicking "btnPrev" navigates backwards and "btnNext" navigates forward.
 *
 * @option btnGo - array - no defaults
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      btnGo: [".0", ".1", ".2"]
 * });
 * @desc If you don't want next and previous buttons for navigation, instead you prefer custom navigation based on
 * the item number within the carousel, you can use this option. Just supply an array of selectors for each element
 * in the carousel. The index of the array represents the index of the element. What i mean is, if the
 * first element in the array is ".0", it means that when the element represented by ".0" is clicked, the carousel
 * will slide to the first element and so on and so forth. This feature is very powerful. For example, i made a tabbed
 * interface out of it by making my navigation elements styled like tabs in css. As the carousel is capable of holding
 * any content, not just images, you can have a very simple tabbed navigation in minutes without using any other plugin.
 * The best part is that, the tab will "slide" based on the provided effect. :-)
 *
 * @option mouseWheel : boolean - default is false
 * @example
 * $(".carousel").jCarouselLite({
 *      mouseWheel: true
 * });
 * @desc The carousel can also be navigated using the mouse wheel interface of a scroll mouse instead of using buttons.
 * To get this feature working, you have to do 2 things. First, you have to include the mouse-wheel plugin from brandon.
 * Second, you will have to set the option "mouseWheel" to true. That's it, now you will be able to navigate your carousel
 * using the mouse wheel. Using buttons and mouseWheel or not mutually exclusive. You can still have buttons for navigation
 * as well. They complement each other. To use both together, just supply the options required for both as shown below.
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      mouseWheel: true
 * });
 *
 * @option auto : number - default is null, meaning autoscroll is disabled by default
 * @example
 * $(".carousel").jCarouselLite({
 *      auto: 800,
 *      speed: 500
 * });
 * @desc You can make your carousel auto-navigate itself by specfying a millisecond value in this option.
 * The value you specify is the amount of time between 2 slides. The default is null, and that disables auto scrolling.
 * Specify this value and magically your carousel will start auto scrolling.
 *
 * @option speed : number - 200 is default
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      speed: 800
 * });
 * @desc Specifying a speed will slow-down or speed-up the sliding speed of your carousel. Try it out with
 * different speeds like 800, 600, 1500 etc. Providing 0, will remove the slide effect.
 *
 * @option easing : string - no easing effects by default.
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      easing: "bounceout"
 * });
 * @desc You can specify any easing effect. Note: You need easing plugin for that. Once specified,
 * the carousel will slide based on the provided easing effect.
 *
 * @option vertical : boolean - default is false
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      vertical: true
 * });
 * @desc Determines the direction of the carousel. true, means the carousel will display vertically. The next and
 * prev buttons will slide the items vertically as well. The default is false, which means that the carousel will
 * display horizontally. The next and prev items will slide the items from left-right in this case.
 *
 * @option circular : boolean - default is true
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      circular: false
 * });
 * @desc Setting it to true enables circular navigation. This means, if you click "next" after you reach the last
 * element, you will automatically slide to the first element and vice versa. If you set circular to false, then
 * if you click on the "next" button after you reach the last element, you will stay in the last element itself
 * and similarly for "previous" button and first element.
 *
 * @option visible : number - default is 3
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      visible: 4
 * });
 * @desc This specifies the number of items visible at all times within the carousel. The default is 3.
 * You are even free to experiment with real numbers. Eg: "3.5" will have 3 items fully visible and the
 * last item half visible. This gives you the effect of showing the user that there are more images to the right.
 *
 * @option start : number - default is 0
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      start: 2
 * });
 * @desc You can specify from which item the carousel should start. Remember, the first item in the carousel
 * has a start of 0, and so on.
 *
 * @option scrool : number - default is 1
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      scroll: 2
 * });
 * @desc The number of items that should scroll/slide when you click the next/prev navigation buttons. By
 * default, only one item is scrolled, but you may set it to any number. Eg: setting it to "2" will scroll
 * 2 items when you click the next or previous buttons.
 *
 * @option beforeStart, afterEnd : function - callbacks
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      beforeStart: function(a) {
 *          alert("Before animation starts:" + a);
 *      },
 *      afterEnd: function(a) {
 *          alert("After animation ends:" + a);
 *      }
 * });
 * @desc If you wanted to do some logic in your page before the slide starts and after the slide ends, you can
 * register these 2 callbacks. The functions will be passed an argument that represents an array of elements that
 * are visible at the time of callback.
 *
 *
 * @cat Plugins/Image Gallery
 * @author Ganeshji Marwaha/ganeshread@gmail.com
 */

(function($) {                                          // Compliant with jquery.noConflict()
$.fn.jCarouselLite = function(o) {
    o = $.extend({
        btnPrev: null,
        btnNext: null,
        btnGo: null,
        mouseWheel: false,
        auto: null,

        speed: 200,
        easing: null,

        vertical: false,
        circular: true,
        visible: 3,
        start: 0,
        scroll: 1,

        beforeStart: null,
        afterEnd: null
    }, o || {});
    return this.each(function() {                           // Returns the element collection. Chainable.

        var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
        var div = $(this);
		var ul = $(this).find("ul");
		var tLi = $("li", ul), tl = tLi.size(), v = o.visible;
		
	   if(o.circular) {
            ul.prepend(tLi.slice(tl-v-1+1).clone())
              .append(tLi.slice(0,v).clone());
            o.start += v;
        }

        var li = $("li", ul), itemLength = li.size(), curr = o.start;
        div.css("visibility", "visible");

        li.css({overflow: "hidden", float: o.vertical ? "none" : "left"});
        ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});
        div.css({overflow: "hidden", position: "relative", "z-index": "2", left: "0px"});

        var liSize = o.vertical ? height(li) : width(li);   // Full li size(incl margin)-Used for animation
        var ulSize = liSize * itemLength;                   // size of full ul(total length, not just for the visible items)
        var divSize = liSize * v;                           // size of entire div(total length for just the visible items)

        li.css({width: li.width(), height: li.height()});
        ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

        div.css(sizeCss, divSize+"px");                     // Width of the DIV. length of visible images

        if(o.btnPrev)
            $(o.btnPrev).click(function() {
                return go(curr-o.scroll);
            });

        if(o.btnNext)
            $(o.btnNext).click(function() {
                return go(curr+o.scroll);
            });

        if(o.btnGo)
            $.each(o.btnGo, function(i, val) {
                $(val).click(function() {
                    return go(o.circular ? o.visible+i : i);
                });
            });

        if(o.auto)
            setInterval(function() {
                go(curr+o.scroll);
            }, o.auto+o.speed);

        function vis() {
            return li.slice(curr).slice(0,v);
        };

        function go(to) {
            if(!running) {

                if(o.beforeStart)
                    o.beforeStart.call(this, vis());

			   if (to < 0) to = 0;				
                  if(to < 0 || to > itemLength) return;
                   else {
					if (to > itemLength - v) to = itemLength - v;
					curr = to;
				}

                running = true;

                ul.animate(animCss == "left" ? { left: -(curr*liSize) } : { top: -(curr*liSize) } , o.speed, o.easing,
                    function() {
                        if(o.afterEnd)
                            o.afterEnd.call(this, vis());
                        running = false;
                    }
                );
                // Disable buttons when the carousel reaches the last/first, and enable when not
                if(!o.circular) {
                    $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
					//alert('o scroll ' + o.scroll + ' curr: ' + curr +' itemleng:'+itemLength + 'v: ' +v);
                    $((curr == 0 && o.btnPrev) || (curr + o.scroll >= itemLength && o.btnNext) || []).addClass("disabled");
                }

            }
            return false;
        };
    });
};

function css(el, prop) {
    return parseInt($.css(el[0], prop)) || 0;
};
function width(el) {
    return  el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
};
function height(el) {
    return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
};

})(jQuery);