var offset=0;
if (screen.width > 800) { offset=(screen.width - 800) / 2; }

if (offset) {
document.write ("<style type='text/css'>\n");
document.write (".Width { left: "  + (offset) + "px;}\n");

document.write ("</style>\n");
}

// Popup window
function PopUp() {
window.open("popup.html","","toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=300,height=200,left = 426,top = 332");
}