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1.×¢²áÒ³Ãæ
JS²¿·Ö:
<script language="JavaScript">
function chuser(){
  var csuser=document.getElementById("csuser").value;
   if((csuser == null) || (csuser == ""))
 {
   document.getElementById("loginid_info").className = 'STYLE1';
   document.getElementById("loginid_info").innerHTML = 'Óû§Ãû²»ÄÜΪ¿Õ¡£';
  return false;
 }
  else
    if(csuser.length<6 || csuser.length>16)
   {
    document.getElementById("loginid_info").className = 'STYLE1';
    document.getElementById("loginid_info").innerHTML = 'Óû§Ãû±ØÐëΪ6-16λ¡£';
    return false;
   }
   //var filter=/^\s*[.A-Za-z0-9_-]{2,16}\s*$/;
   //if (!filter.test(username.value)) {
    //document.getElementById("loginid_info").background='#BFDFFF'
    //document.getElementById("loginid_info").innerHTML = 'Óû§Ãû±ØÐëÓÉÊý×Ö,Ó¢ÎÄ»òÏ»®Ïß×é³É¡£'
    //return false;
   //{
   //document.getElementById("loginid_info").innerHTML = '<font color=#red>Óû§Ãû±ØÐëÓÉÊý×Ö,Ó¢ÎÄ»òÏ»®Ïß×é³É¡£</font>'
   // return false;
   //}
    else{
    GetResult(csuser)
    document.getElementById("loginid_info").className = 'STYLE2';
    //document.getElementById("loginid_info").innerHTML = '<font color=#0066ee>ÌîдÕýÈ·¡£</font>'
   }
}
function GetResult(opr)
{
var oBao = new ActiveXObject("Microsoft.XMLHTTP");
var my_url="ch.asp?username="+ escape(opr);
oBao.open("POST",my_url,false);
oBao.send(null);
var strResult = unescape(oBao.responseText);
document.getElementByI