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var xmlHttp;
var viewModel;//需要显示的区块
//建立异步处理对象
function createXMLHttpRequest() {
xmlHttp = false;
//开始初始化XMLHttpRequest对象
if(window.XMLHttpRequest) { //Mozilla 浏览器
xmlHttp = new XMLHttpRequest();
if (xmlHttp.overrideMimeType) {//设置MiME类别
xmlHttp.overrideMimeType('text/xml');
}
}
else if (window.ActiveXObject) { // IE浏览器
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!xmlHttp) { // 异常,创建对象实例失败
window.alert("不能创建XMLHttpRequest对象实例.");
return false;
}
}
//请求页面更换
function requestMain(model,url)
{
createXMLHttpRequest();
viewModel=model;
document.getElementById(model).innerHTML="<div id='loading'>正在加载...</div>";
url=url+time="+new Date().getTime();
xmlHttp.open("GET", url, true);
xmlHttp.onreadystatechange = viewMain;
xmlHttp.send(null);
}
function viewMain()
{
if (xmlHttp.readyState == 4)
{
if (xmlHttp.status == 200)
{
setTimeout("viewContent()", 800); }
}
}
//显示模块
function viewContent()
{
document.getElementById(viewModel).innerHTML=xmlHttp.responseText;
}
<div id="view"></div>
<a href="javascript:void(0)" onClick="requestMain('<s:url action="HelloAction?Msg=Hello World.">',view)">Action</a>
<a href="javascript:void(0)" onClick="requestMain('<s:url action="HelloAction?Msg=test ok.">',view)">Action</a>
HttpServletRequest request = ServletActionContext.getRequest();
String Message = request.getParameter("Msg");