window.onload = function() {
 
	// check to see that the browser supports the getElementsByTagName method
 
	// if not, exit the loop 
 
	if (!document.getElementsByTagName) {
 
		return false; 
 
	} 
 
	// create an array of objects of each link in the document 
 
	var popuplinks = document.getElementsByTagName("a");
 
	// loop through each of these links (anchor tags) 	
 
	for (var i=0; i < popuplinks.length; i++) {	
 
		// if the link has a class of "popup"...	
 
		if (popuplinks[i].getAttribute("class") == "popup") {	
 
			// add an onclick event on the fly to pass the href attribute	
 
			// of the link to our second function, openPopUp 	
 
			popuplinks[i].onclick = function() {	
 
			openPopUp(this.getAttribute("href"));	
 
			return false; 	
 
			} 	
 
		}
 
	} 
 
} 
 
 
 
function openPopUp(linkURL) {
 
window.open(linkURL,'popup','width=220px,height=130px,resizable=yes')
 
}