$(function(){
	
	$(".nextdivopenner").click(function(){
			
		if ($(this).next("div").children("div:visible").length != 0) { 
			$(this).next("div").children("div").slideUp("fast"); 
			$(this).css("background", "url(/labsero/pictures/arrow-green-right.jpg) no-repeat right 20px");
		} else {
			$(this).next("div").children("div").slideDown("fast");
			$(this).css("background", "url(/labsero/pictures/arrow-green-bottom.jpg) no-repeat right 20px");
		}

	});
});