$(document).ready(function(){
	$(".hover").mouseover( function(){
		var newChaine = $(this).attr("src").split(".");
		if($(this).attr("src").indexOf("_hover.") == -1) $(this).attr("src", newChaine[newChaine.length-2] + "_hover." + newChaine[newChaine.length-1]);		
	} );
	$(".hover").mouseout( function(){ 
		var newChaine = $(this).attr("src").split("_hover");
		if($(this).attr("src").indexOf("_hover.") != -1) $(this).attr("src", newChaine[newChaine.length-2] + newChaine[newChaine.length-1]);
	} );
});