$(document).ready(function(){
	$('.over_img').fadeTo('fast', 0); //hides the image from view
	$('.over_img').hover(function(){ //when hovered...
		$(this).stop().fadeTo('normal', 1.0); //fade the overlay_img to 100% in normal speed
		}, 
		function(){   
		$(this).stop().fadeTo("normal", 0); //when not hovered fade back to 0% in normal speed
	});
});