function zoom (path, w, h, header)
{
scrollbars = 0;
screenW = screen.width;
screenH = screen.height;
leftPos = (screenW - w)/2;
topPos = (screenH - h)/2;
if (w > 770) {w = 770;}
if (h > 680) {h = 680;}
var params = "width=" + w + ", height=" + h + ", top="+topPos+", left="+leftPos+",menubar=no,location=no,resizable=0,scrollbars=" + scrollbars;
win=open("", "New", params);
win.document.open();
win.document.write (''+header+'
');
win.document.close();
win.focus();
}