window.onload = function()
{
targetBlank();
}
function targetBlank(){
 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.getAttribute("rel") == "blank")
 anchor.target = "_blank";
 }
}