/* PRIVATE Functions */
function isNN4(){
  if(!navigator.appName || !navigator.appVersion) return 0;
  return (navigator.appName=="Netscape" && navigator.appVersion.indexOf("4.")==0)
}

function isIE4(){
  if(document.all) return 1;
  return 0;
}

function isIE5(){
  return (isIE4() && document.getElementById);
}

/* PUBLIC Functions */
function checkSupportedBrowser() {
  if(isNN4()){ 
  	if (!err_lang || err_lang=="")
  		location.href="/errors/unsupported.html" /* alert("Unsupported Browser")*/;
  	else if (err_lang=="zh_CN"||err_lang=="zh_TW"||err_lang=="ko"||err_lang=="th")
  		location.href="/errors/unsupported_"+err_lang+".html" /* alert("Unsupported Browser")*/;
  	else 
  		location.href="/errors/unsupported.html" /* alert("Unsupported Browser")*/;
  }
}

function msieversion()
   {
      var ua = window.navigator.userAgent
      var msie = ua.indexOf ( "MSIE " )

      if ( msie > 0 )      // If Internet Explorer, return version number
         return parseInt (ua.substring (msie+5, ua.indexOf (".", msie )))
      else                 // If another browser, return 0
         return 0

   }