var prodpopwindow;

function prodpopup(infwidth, infheight, infurl)
{
   var infourl = 'prodinf/' + infurl;
   var prodinfo = 'width=' + infwidth + ', height=' + infheight + ', top=5, left=5, scrollbars, resizable';

   if (prodpopwindow != null) prodpopwindow.close();
      prodpopwindow= window.open(infourl, "", prodinfo);
}