/* 
 * jquery - collapser - plugin v1.0
 * http://www.aakashweb.com/
 * copyright 2010, aakash  download by http://www.codefans.net
 * released under the mit license.
 */

(function($){
    $.fn.collapser= function(options, beforecallback, aftercallback) {
        
        var defaults = {
            target: 'next',
			targetonly: null,
            effect: 'slide',
			changetext: false,
			expandhtml: 'expand',
			collapsehtml: 'collapse',
			expandclass: '',
			collapseclass:''
        };
        
        var options = $.extend(defaults, options);
		
		var exphtml,collhtml, effectshow, effecthide;
		
		if(options.effect == 'slide'){
			effectshow = 'slidedown';
			effecthide = 'slideup';
		}else{
			effectshow = 'fadein';
			effecthide = 'fadeout';
		}
		
		if(options.changetext == true){
			exphtml = options.expandhtml;
			collhtml = options.collapsehtml;
		}
		
		function callbeforecallback(obj){
			if(beforecallback !== undefined){
				beforecallback.apply(obj);
			}
		}
		
		function callaftercallback(obj){
			if(aftercallback !== undefined){
				aftercallback.apply(obj);
			}
		}
		
		function hideelement(obj, method){
			callbeforecallback(obj);
			if(method == 1){
				obj[options.target](options.targetonly)[effecthide]();
				obj.html(exphtml);
				obj.removeclass(options.collapseclass);
				obj.addclass(options.expandclass);
			}else{
				$(document).find(options.target)[effecthide]();
				obj.html(exphtml);
				obj.removeclass(options.collapseclass);
				obj.addclass(options.expandclass);
			}
			callaftercallback(obj);
		}
		
		function showelement(obj, method){
			callbeforecallback(obj)
			if(method == 1){
				obj[options.target](options.targetonly)[effectshow]();
				obj.html(collhtml);
				obj.removeclass(options.expandclass);
				obj.addclass(options.collapseclass);
			}else{
				$(document).find(options.target)[effectshow]();
				obj.html(collhtml);
				obj.removeclass(options.expandclass);
				obj.addclass(options.collapseclass);
			}
			callaftercallback(obj);
		}
		
		function toggleelement(obj, method){
			if(method == 1){
				if(obj[options.target](options.targetonly).is(':visible')){
					hideelement(obj, 1);
				}else{
					showelement(obj, 1);
				}
			}else{
				if($(document).find(options.target).is(':visible')){
					hideelement(obj, 2);
				}else{
					showelement(obj, 2);
				}
			}
		}
		
		return this.each(function(){
		   
		   if($.fn[options.target] && $(this)[options.target]()){
				$(this).toggle(function(){		
					toggleelement($(this), 1);
				},function(){
					toggleelement($(this), 1);
				});	
				
		   }else{
			   
			   $(this).toggle(function(){
					toggleelement($(this), 2);
				},function(){
					toggleelement($(this), 2);
				});
		   }
		   
		   // initialize  
		   if($.fn[options.target] && $(this)[options.target]()){
				if($(this)[options.target]().is(':hidden')){
					$(this).html(exphtml);
					$(this).removeclass(options.collapseclass);
					$(this).addclass(options.expandclass);
				}else{
					$(this).html(collhtml);
					$(this).removeclass(options.expandclass);
					$(this).addclass(options.collapseclass);
				}
			}else{
				if($(document).find(options.target).is(':hidden')){
					$(this).html(exphtml);
				}else{
					$(this).html(collhtml);
				}
			}
		   
        });
    };
    
})(jquery);