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/1573/Visitor/vTracker_v2.asp?websiteid=0&groupid=1573');
  document.getElementsByTagName('head').item(0).appendChild(js);
 }
 window.onload = wsa_include_js;