window.onload = function() {
	if (!document.getElementsByTagName) {
		return false; 
	} 
	var popuplinks = document.getElementsByTagName("a");
	for (var i=0; i < popuplinks.length; i++) {	
		if (popuplinks[i].getAttribute("class") == "popup") {	
			popuplinks[i].onclick = function() {	
			openPopUp(this.getAttribute("href"));	
			return false; 	
			} 	
		}
	} 
} 
function openPopUp(linkURL) {
	window.open(linkURL,'popup','width=320,height=420,resizable=no')
}