delay = 1500;
var vi = new Array();
for(x = 0; x <= 6; x++)
{
vi[x] = new Image();
vi[x].src ="images/a"+x+".gif";
}
x = 0;
function animation()
{
document.vip.src = vi[x].src;
x++;
if(x > 6)
{
x = 0;
} 
}