function myGetQuery(myKeyWord){
   myKeyWord = "&" + myKeyWord + "=";
   myValue = null;
   myStr = location.search;
   myLen = myStr.length;
   myStr = "&" + myStr.substring(1,myLen) + "&";
   myOfst = myStr.indexOf(myKeyWord);
   if (myOfst != -1){
      myStart = myOfst + myKeyWord.length;
      myEnd   = myStr.indexOf("&" , myStart);
      myValue = myStr.substring(myStart,myEnd);
      myValue = unescape(myValue);
   }
   return myValue;
}