var properties = { width: 500,

                       height: 350,

                       scrollbars: 'no',

                       resizable: 'no' };

    function popup(){

      var link = this.getAttribute( 'href' );

      var prop_str = '';

      for( prop in properties ){

        prop_str = prop_str + prop + '=' + properties[prop] + ',';

      }

      prop_str = prop_str.substr( 0, prop_str.length - 1 );

	 var newWindow = window.open( link, '', prop_str );

	 return false;

    }

    function setupPopups(){

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

      for( var i=0; i<links.length; i++ ){

        if( links[i].getAttribute( 'rel' ) &&

            (links[i].getAttribute( 'rel' ) == 'popup' ||

             links[i].getAttribute( 'rel' ) == 'popup nofollow')) 

	links[i].onclick = popup;

      }

    }

    window.onload = function(){ 

      setupPopups();

    }