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// AJAXÀà
function AJAXRequest() {
var xmlObj = false;
var CBfunc,ObjSelf;
ObjSelf=this;
try { xmlObj=new XMLHttpRequest; }
catch(e) {
try { xmlObj=new ActiveXObject("MSXML2.XMLHTTP"); }
catch(e2) {
try { xmlObj=new ActiveXObject("Microsoft.XMLHTTP"); }
catch(e3) { xmlObj=false; }
}
}
if (!xmlObj) return false;
this.method="POST";
this.url;
this.async=true;
this.content="";
this.callback=function(cbobj) {return;}
this.send=function() {
if(!this.method||!this.url||!this.async) return false;
xmlObj.open (this.method, this.url, this.async);
if(this.method=="POST") xmlObj.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xmlObj.onreadystatechange=function() {
if(xmlObj.readyState==4) {
if(xmlObj.status==200) {
ObjSelf.callback(xmlObj);
}
}
}
if(this.method=="POST") xmlObj.send(this.content);
else xmlObj.send(null);
}
}
ÀàÃû£ºAJAX
´´½¨·½·¨£ºvar ajaxobj=new AJAX;£¬Èç¹û´´½¨Ê§°ÜÔò·µ»Øfalse
ÊôÐÔ£ºmethod  -  ÇëÇó·½·¨£¬×Ö·û´®£¬POST»òÕßGET£¬Ä¬ÈÏΪPOST
¡¡¡¡¡¡url         -  ÇëÇóURL£¬×Ö·û´®£¬Ä¬ÈÏΪ¿Õ
¡¡¡¡¡¡async     -  ÊÇ·ñÒì²½£¬trueΪÒì²½£¬falseΪͬ²½£¬Ä¬ÈÏΪtrue
¡¡¡¡¡¡content -  ÇëÇóµÄÄÚÈÝ£¬Èç¹ûÇëÇó·½·¨ÎªPOSTÐèÒªÉ趨´ËÊôÐÔ£¬Ä¬ÈÏΪ¿Õ
¡¡¡¡¡¡callback  - »Øµ÷º¯Êý£¬¼´·µ»ØÏìÓ¦ÄÚÈÝʱµ÷Óõĺ¯Êý£¬Ä¬ÈÏΪֱ½Ó·µ»Ø£¬»Øµ÷º¯ÊýÓÐÒ»¸ö²ÎÊýΪXMLHttpRequest¶ÔÏ󣬼´¶¨Ò廨µ÷º¯ÊýʱҪÕâÑù£ºfunction mycallback(xmlobj)
·½·¨£ºsend()     -  ·¢ËÍÇëÇó£¬ÎÞ²ÎÊý
Ò»¸öÀý×Ó£º
<script type="text/javascript" src="ajaxrequest.js"></script>
<script type="text/javascript">
var ajaxobj=new AJAXRequest;    // ´´½¨AJAX¶ÔÏó
ajaxobj.method="GET";   // ÉèÖÃÇëÇó·½Ê½ÎªGET
ajaxobj.url="default.asp"  // URLΪdefault.asp
// ÉèÖûص÷º¯Êý£¬Êä³öÏìÓ¦ÄÚÈÝ
ajaxobj.callback=function(xmlobj) {
     document.write(xml


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