function wsa_include_js(){
  var js = document.createElement('script'); 
      js.setAttribute('language','javascript');
      js.setAttribute('type','text/javascript');
      js.setAttribute('src','https://a1.websitealive.com/159/Visitor/vTracker_v2.asp?websiteid=0&groupid=159'); 
  document.getElementsByTagName('head').item(0).appendChild(js);}

   if (window.attachEvent) {window.attachEvent('onload', wsa_include_js);}
     else if (window.addEventListener) {window.addEventListener('load', wsa_include_js, false);}
    else {document.addEventListener('load', wsa_include_js, false);
}