$(".hover").css("cursor", "pointer");
$(".hover").bind("mouseover", function(){
	var newSrc = $(this).attr("src");
	var newExt = newSrc.substr(newSrc.length-4);
	newSrc = newSrc.substr(0,newSrc.length-4);
	newSrc += "_hover" + newExt;
	$(this).attr("src", newSrc);
});

	
$(".hover").bind("mouseout", function(){
	var newSrc = $(this).attr("src");
	var newExt = newSrc.substr(newSrc.length-4);
	newSrc = newSrc.substr(0,newSrc.length-10);
	newSrc += newExt;
	$(this).attr("src", newSrc);
});

$(".hover").each(function(index){
	var newSrc = $(this).attr("src");
	var newExt = newSrc.substr(newSrc.length-4);
	newSrc = newSrc.substr(0,newSrc.length-4);
	newSrc += "_hover" + newExt;
	var img = new Image();
	img.src = newSrc;
});