function recycleframes(){
  document.body.onunload=null;
}

function externalLinks() {
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href"))
   {
     anchor.onclick=new Function('recycleframes();return true;');
     if(anchor.getAttribute("rel") == "external")
       anchor.target = "_blank";
     if (anchor.getAttribute("rel") == "noframes")
       anchor.target = "_top";
   }
 }
 recycleframes();
}

function setbasetarget(target)
{
  var anchors=document.getElementsByTagName('a');
  if(anchors)
  {
    for(var i=0;i<anchors.length;i++)
    {
      var anchor = anchors[i];
      if(!anchor.target)
        anchor.target="main";
    }
  }
}