function submitonce(theform){
  if (document.all||document.getElementById){
    for (i=0;i<theform.length;i++){
      var tempobj=theform.elements[i]
      if(tempobj.type.toLowerCase()=="submit")
      tempobj.disabled=true
    }
  }
}
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.getAttribute("rel") == "external")
      anchor.target = "_blank";
  }
}