function $E(selector,filter){return($(filter)||document).getElement(selector);};

window.addEvent('domready',  function(){
			
									  
				var list = $$('#vertical div.collapse');
				var headings = $$('#vertical div.leesmeer');
				var collapsibles = new Array();
				//var heading=$('vertical');
				
				headings.each( function(heading, i) {

					var collapsible = new Fx.Slide(list[i], { 
						duration: 500, 
						transition: Fx.Transitions.linear,
						onComplete: function(request){ 
							var open = request.getStyle('margin-top').toInt();
							//if(open >= 0) new Fx.Scroll(window).toElement(headings[i]);
						}
					});
					
					collapsibles[i] = collapsible;
					
					heading.onclick = function(){
						var span = $E('span', heading);
						
						if(span){
							//var newHTML = span.innerHTML == '+' ? '-' : '+';
							//span.setHTML(newHTML);
							span.setStyle('display', 'none');
						}
						
						collapsible.toggle();
						return false;
					}
					
					collapsible.hide();
					
				});

	
	
		});