jQuery(document).ready(function(){
						    jQuery(".attachment-thumbnail").fadeTo("slow", 0.3); // This sets the opacity of the thumbs to fade down to 30% when the page loads
						    jQuery(".attachment-thumbnail").hover(function(){
						    jQuery(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover
						   },function(){
						    jQuery(this).fadeTo("slow", 0.3); // This should set the opacity back to 30% on mouseout
						   });
						   });