var time = 150;
			var overMenu = function(index){
				if(currentImage != index) {
			        $("#img_"+index+"_on").fadeIn(time);
			        $("#img_"+index+"_off").fadeOut(time);
			    }
			}
			var outMenu = function(index){
				 if(currentImage != index) {   
				    $("#img_"+index+"_off").fadeIn(time);
				    $("#img_"+index+"_on").fadeOut(time);
				 }
			}