var start="images/traces/"
var preload = new Array(
'traces01.jpg',
'traces02.jpg',
'traces03.jpg',
'traces04.jpg',
'traces05.jpg',
	);

var loader = new Array();
for(var i = 0; i < preload.length; i++){
   loader[i] = new Image();
   loader[i].src = start+preload[i];
}