$(document).ready(function(){
	$(".box_details_container").hide();
	$(".sponsor").toggle(function(){
		$(this).next(".box_details_container").slideDown(300);
		var t = $(this).find(".cross");
		t.css('background-image','url(images/minus.gif)');
		}, function(){
			$(this).next(".box_details_container").slideUp(300);
			var t = $(this).find(".cross");
			t.css('background-image','url(images/cross.gif)');
	});
});