var a2 = 60 // interval in seconds
imgsrc2 = "";
function ErrorImg2() {
setTimeout("LoadImg2()", a2*1000);
}

function LoadImg2() {
if (imgsrc2 == "") imgsrc2 = document.images.visiongs2.src;
document.images.visiongs2.onload = "";
tmp = new Date();
tmp = "?"+tmp.getTime();
document.images.visiongs2.src = imgsrc2+tmp;
setTimeout("LoadImg2()", a2*1000);
}