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    Ëæ×ÅÒ³ÃæµÄ¸´ÔÓ£¬¿ÉÄÜÐèÒªÊéд´óÁ¿µÄJavascript½Å±¾À´¶ÔÒ³ÃæÖеÄDOM¶ÔÏó½øÐпØÖÆ£¬¹¤×÷Á¿ºÍ¸´ÔÓ¶È»á´ó´óÔö¼Ó¡£Ajax±à³Ì¿ò¼Üͨ³£ÀûÓÃÃæÏò¶ÔÏóµÄ·½·¨£¬¶ÔһЩ»ù±¾µÄ¶ÔÏóºÍÐÐΪ¼°Æä¸´ÔÓÐÔ½øÐÐÁ˺ÏÀíµÄ·â×°£¬½¨ÔìÁËÒ»Ì×ÓÐ×Ô¼ºÌØÉ«µÄÀà¿â£¬²¢ÇÒ¿¼ÂÇÁËЧÂʺͿÉÀ©³äÐÔµÈÓŵ㡣ÎÒÃÇÔÚ¿ª·¢Ê±£¬¿ÉÒÔʹÓýÏÉٵġ¢¸üÇåÎúµÄ´úÂ룬Íê³É×Ô¼ºµÄ¹¤×÷¡£Ò²Ê¹³ÌÐòÔ±Óиü¶àµÄʱ¼äºÍ¾«Á¦¿¼ÂÇÒµÎñÂß¼­±¾Éí£¬¶ø²»ÊÇÓëÒ»¶Ñ½Å±¾¾À²øÔÚÒ»Æð¡£
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    <?php
      require_once ("../xajax/xajax.inc.php");
      //·þÎñÆ÷´¦Àíº¯Êý
      function processForm($aFormValues)
      {
       $objResponse = new xajaxResponse();
       $bError = false;
       //Çå¿Õ´íÎóÐÅÏ¢
       $objResponse->addClear("usernameInfo", "innerHTML");
       //ÅжÏÕ˺Å
       if (trim($aFormValues['username']) == "")
       {
        $objResponse->addAppend("usernameInfo", "innerHTML", "Please Input user name.");
        $bError = true;
       }
       else
       {
          if(trim($aFormValues['username'])=="Thomas")
           $objResponse->addAppend("usernameInfo", "innerHTML", "Has been registed");
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