function doPopup() {
	if (!document.getElementsByTagName) return false;
	var links = document.getElementsByTagName("a");
	for (var i=0; i < links.length; i++) {
		if (links[i].className.match("popup")) {
			links[i].onclick = function() {
				window.open(this.href,'test','scrollbars=yes,menubar=yes,toolbar=yes,location=yes,status=yes,resizable=yes');
				return false;
			}
		}
	}
}

window.onload = doPopup;