links = document.getElementsByTagName('A');
for(i=0,a=links.length;i<a;i++)
{
  if(links[i].className.indexOf('blank') > -1)
  {
    links[i].onclick = function(e){
      var event = e || window.event;
      window.open(this.href);
      if (event.stopPropagation) {
        event.stopPropagation();
      } else {
        event.cancelBubble = true;
      }
      
      return false; 
    }
  }
}