window.onload = function (){  

 var node_a = document.getElementsByTagName('a');  

 for (var i in node_a) {  

 if(node_a[i].className == 'popup'){  

 node_a[i].onclick = function() {  

 return winOpen(this.href, this.rel)  

 };  

 }  

 }  

 } ;  

 function winOpen(url, rel) {  

 var split = rel.split(',') ;  

 window.open(  

 url,'popup',  

 'width='+ split[0] +',height='+ split[1] +',toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes');  

 return false;  

 };