$(function() {
	var rolloverbilder = [];
	$('.rolloverbild').each(function(index){
		var rollURL = $(this).attr('rel');
		var normalURL = $(this).css('background-image');
		var myRolloverImg = new Image();
		myRolloverImg.src = rollURL;
		rolloverbilder.push(myRolloverImg);
		
		// console.log(rollURL);
		
		$(this).mouseover(function(){
			$(this).css('background-image','url('+rollURL+')');				  
		});
		
		$(this).mouseout(function(){
			$(this).css('background-image',normalURL);				  
		});
		
		
		
	});
});