使用jQuery实现AJAX帐号验证效果

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=GB2312" /><title>使用jQuery实现AJAX帐号验证效果</title><mce:script type="text/javascript" src="jquery-1.4.min.js" mce_src="jquery-1.4.min.js"></mce:script><mce:script type="text/javascript" language="javascript"></mce:script><mce:style type="text/css"></mce:style><style type="text/css" mce_bogus="1">.red {border:1px dashed #FF0000;color:#FF0000;font-size:12px;padding:2px 2px 2px 20px;width:280px;background:#FFCCFF url(error.gif) no-repeat 2px center;}.green {border:1px dashed #006600;color:#006600;font-size:12px;padding:2px 2px 2px 20px;width:280px;background:#99FF00 url(info.gif) no-repeat 2px center;}</style></head><body><h1>使用jQuery实现AJAX帐号验证效果</h1><form method="post" action=""><table><tr><td><label for="username">帐号：</label></td><td><input type="text" name="username" id="username" /></td><td><div id="result"></div></td></tr></table></form></body></html>

register_handler.php

<?phpheader("Content-type: text/html; charset=GBK");if (isset($_REQUEST['username'])) {$username = $_REQUEST['username'];if (iconv("utf-8", "gb2312", $_REQUEST['username']) == "没有被占用") {echo "true";exit();}}echo "false";?>