本文实例讲述了Ajax加载外部页面弹出层效果实现方法。分享给大家供大家参考。具体实现方法如下：
<!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=utf-8" />
<title>Ajax加载外部页面的一个弹出层效果</title>
<style>
body {margin:0px}
#Loading {position:absolute;z-index:10;left:10px;top:10px;border:1px #666666 solid;background:#eeeeee;width:10px;height:10px}
.LoadContent {width:100%;height:100%;overflow:auto}
</style>
<script LANGUAGE="JavaScript">
<!--
function $(){return document.getElementById?document.getElementById(arguments[0]):eval(arguments[0]);}
var OverH,OverW,ChangeDesc,ChangeH=50,ChangeW=50;
function OpenDiv(_Dw,_Dh,_Desc) {
$("Loading").innerHTML="Loading...";
OverH=_Dh;OverW=_Dw;ChangeDesc=_Desc;
$("Loading").style.display='';
if(_Dw>_Dh){ChangeH=Math.ceil((_Dh-10)/((_Dw-10)/50))}else if(_Dw<_Dh){ChangeW=Math.ceil((_Dw-10)/((_Dh-10)/50))}
$("Loading").style.top=(document.documentElement.clientHeight-10)/2 "px";
$("Loading").style.left=(document.documentElement.clientWidth-10)/2 "px";
OpenNow()
}
var Nw=10,Nh=10;
function OpenNow() {
if (Nw>OverW-ChangeW)ChangeW=2;
if (Nh>OverH-ChangeH)ChangeH=2;
Nw=Nw ChangeW;Nh=Nh ChangeH;
if(OverW>Nw||OverH>Nh) {
if(OverW>Nw) {
$("Loading").style.width=Nw "px";
$("Loading").style.left=(document.documentElement.clientWidth-Nw)/2 "px";
}
if(OverH>Nh) {
$("Loading").style.height=Nh "px";
$("Loading").style.top=(document.documentElement.clientHeight-Nh)/2 "px"
}
window.setTimeout("OpenNow()",10)
}else{
Nw=10;Nh=10;ChangeH=50;ChangeW=50;
AjaxGet(ChangeDesc)
}
}
//创建XML对象
function createXMLHttps(){
var ret = null;
try {ret = new ActiveXObject('Msxml2.XMLHTTP')}
catch (e) {
try {ret = new ActiveXObject('Microsoft.XMLHTTP')}
catch (ee) {ret = null}
}
if (!ret&&typeof XMLHttpRequest !='undefined') ret = new XMLHttpRequest();
return ret;
}
function AjaxGet(URL) {
var xmlhttp = createXMLHttps();
xmlhttp.open("Get",URL,true);
xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status==404) {$("Loading").innerHTML='读取页面失败,文件' URL '不存在!';return}
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
$("Loading").innerHTML="<div class='LoadContent'>" xmlhttp.responseText "</div>";
}
}
xmlhttp.send(null);
}
//-->
</script>
</head>
<body>
<a href="javascript:OpenDiv(500,300,'index.html')">首页 500*300</a><br><br>
<a href="javascript:OpenDiv(500,200,'index.html')">Test 500*200</a><br><br>
<a href="javascript:OpenDiv(200,500,'l.html')">子页面 200*500</a><br><br>
<div id="Loading" style="display:none" ondblclick="this.style.display='none'"></div>
注意：需加载的文件必须在子目录下，也就是本文件需处于上级才行。页面编码UTF8。
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。