This is the accordion plugin developed for inscopeapps.com

jquery.accordion.js

(function($){
    $.fn.accordion = function(options){
        options = $.extend({
            'header': 'h1', //The header that will be clicked
            'content': 'div', //The content, this must be a sibling of the header
            'showFirst': false, //If true the first item will be expanded on page load
            'easing': null, //The easing style of the animation
            
            //Called when the content will hide
            'willHide': null,
            //Called when the content was hidden
            'didHide': null,            
            
            //The content element is passed to these function
            //Called when the content will be shown
            'willShow': null, 
            //Called when the content was shown
            'didShow': null
        }, options);

        return this.each(function(){
            var root = this;
            //set the width to help slideDown figure out the right height
            var allContents = $(root).find(options.content).width($(root).width());
            
            //find headers
            $(root).find(options.header).each(function(i){
                var header = this;
                
                //find the content
                var content = $(header).siblings(options.content)[0];
                if(content){
                    if(i > 0 || i === 0 && options.showFirst === false){
                        $(content).hide();
                    }
                    
                    //run the show function if the first item is visable on load
                    if(i === 0 && options.showFirst === true && (options.willShow || options.didShow)){
                        if(options.willShow){
                            options.willShow(content);
                        }else if(options.didShow){
                            options.didShow(content);
                        }
                    }
                    
                    $(header).click(function(){
                        //slide up all content elements
                        allContents.slideUp(options.easing);
                        
                        if(options.willHide){
                            options.willHide();
                        }
                        
                        //if the content element is hidden show it
                        if($(content).is(':hidden') === true){
                            if(options.willShow){
                                options.willShow(content);
                            }
                            
                            $(content).slideDown(options.easing, function(){
                                options.didShow(content);
                            });
                        } 
                    });
                }
            });
        });
    };
})(jQuery);