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JScript code:
$("#username").formValidator({onshow:"ÇëÊäÈëÓû§Ãû",onfocus:"3-16λ,Ó¢ÎÄ¿ªÍ·£¬Ó¢ÎÄ¡¢Êý×Ö¡¢Ï»®Ïß×é³É",oncorrect:"¹§Ï²´ËÓû§¿É×¢²á!"}).regexValidator({regexp:"^[a-zA-Z]{1}[a-zA-Z0-9\\_]{2,15}$",onerror:"Óû§Ãû¸ñʽ²»ÕýÈ·,3-16λ,Ó¢ÎÄ¿ªÍ·£¬Ó¢ÎÄ¡¢Êý×Ö¡¢Ï»®Ïß×é³É"})
.ajaxValidator({
type : "get",
url : "ajaxValidator.ashx",
datatype : "json",
success : function(json){
if( json.exists == "1" )
{
return true;
}
else
{
return false;
}
},
buttons: $("#button"),
error: function(){alert("·þÎñÆ÷ûÓзµ»ØÊý¾Ý£¬¿ÉÄÜ·þÎñÆ÷棬ÇëÖØÊÔ");},
onerror : "¸ÃÓû§Ãû²»¿ÉÓã¬Çë¸ü»»Óû§Ãû",
onwait : "ÕýÔÚ¶ÔÓû§Ãû½øÐкϷ¨ÐÔУÑ飬ÇëÉÔºò..."
});


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C# code:
public void ProcessRequest(HttpContext context)
{
string ReturnData = null;
context.Response.ContentType = "text/plain";


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HTML code:

<script type="text/javascript">
<!--
var time = 0;
var http_request=null;
function HttpRequest(){
if (window.ActiveXObject){
......

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$('#elementID').html();
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document.getElementById("¿Ø¼þID").innerHtml;

h ......

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Ϊʲôext²»ÄÜʵÏÖajax?

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<script type="text/javascript">
Ext.onReady(
function ()
{
var root=new Ext.tree.AsyncTreeNode({
id:"root",
text:"Ê÷µÄ¸ù"}); ......
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