$(document).ready(function(){
   $(".icon_mp").fadeTo("slow", 0.7); // This sets the opacity of the thumbs to fade down to 30% when the page loads
   $(".icon_mp").hover(function(){
	   $(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover
   },function(){
	   $(this).fadeTo("slow", 0.7); // This should set the opacity back to 30% on mouseout
   });
});