function initPopups() {

	if (!document.getElementById) return
	
	var aLinks = document.getElementsByTagName('a');

	for (var i = 0; i < aLinks.length; i++) {		
		if (aLinks[i].className == 'popup') {
			
			aLinks[i].onclick = function() {
				var url = this.href;
				openPopup(url);
				return false;
			}	
		}
	}
}

// popupWindow function
// This is where you set your specific height & width etc... for your popups.
function openPopup(url) {	
	window.open(url, 'popupwindow', 'width=450,height=370'); 
	return false;
}


// Piggy-back fucntion onto onLoad event ............................................
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

addLoadEvent(initPopups);