var tab_image = new Array(1);
for (var i=0; i< tab_image.length;i++)
	tab_image[i]= new Image();
tab_image[0].src='images/alu/chassis_alu.jpg';



var n=0;

function change() {
n= ++n;
if (n == tab_image.length) n=0;
window.document.image.src=tab_image[n].src;
}