/* namespacing object */
var net=new Object();

net.READY_STATE_UNINITIALIZED=0;
net.READY_STATE_LOADING=1;
net.READY_STATE_LOADED=2;
net.READY_STATE_INTERACTIVE=3;
net.READY_STATE_COMPLETE=4;

/*--- content loader object for cross-browser requests ---*/
net.ContentLoader=function(url,onload,onerror,method,params,contentType){
? this.req=null;
? this.onload=onload;
? this.onerror=(onerror) ? onerror : this.defaultError;
? this.loadXMLDoc(url,method,params,contentType);
}

net.ContentLoader.prototype.loadXMLDoc=function(url,method,params,contentType){

? if (!method){
??? method="GET";
? }
? if (!contentType && method=="POST"){
??? contentType='application/x-www-form-urlencoded;charset=UTF-8';
? }
? if (window.XMLHttpRequest){
??? this.req=new XMLHttpRequest();
? } else if (window.ActiveXObject){
??? this.req=new ActiveXObject("Microsoft.XMLHTTP");
? }
? if (this.req){
??? try{
????? var loader=this;
????? this.req.onreadystatechange=function(){
??????? net.ContentLoader.onReadyState.call(loader);
????? }
????? this.req.open(method,url,true);
????? if (contentType){
??????? this.req.setRequestHeader('Content-Type', contentType);
????? }
????? this.req.send(params);
??? }catch (err){
????? this.onerror.call(this);
??? }
? }
}

net.ContentLoader.onReadyState=function(){
? var req=this.req;
? var ready=req.readyState;
? if (ready==net.READY_STATE_COMPLETE){
??? var httpStatus=req.status;
??? if (httpStatus==200 || httpStatus==0){
????? this.onload.call(this);
??? }else{
????? this.onerror.call(this);
??? }
? }
}

net.ContentLoader.prototype.defaultError=function(){
? alert("error fetching data!"
??? +"\n\nreadyState:"+this.req.readyState
??? +"\nstatus: "+this.req.status
??? +"\nheaders: "+this.req.getAllResponseHeaders());
}

-----------------------------分隔線---------------------------------
然后在頁(yè)面里加一個(gè)層<div id="repositorylcontent">正在加載相關(guān)信息。。。請(qǐng)稍候。。。</div>
位置:放在加載費(fèi)時(shí)的地方
寫幾個(gè)function

<script event="onload" for="window">
displayRepositorylName();
???? displayRepositorylcontent();
???? displayNews();
???? displayService();
</script>
<script>
??????? var request=false;

??????? function displayRepositorylName(){
????????? var serviceUrl = serverUrl+"repositoryldetailservlet?command=displayRepositorylName&repositorylid=72";
????????? var params = "";
????????? new net.ContentLoader(serviceUrl,showdisplayRepositorylName,null,"GET",params,null);
?}
?function showdisplayRepositorylName(){
????????? var data=this.req.responseText;
????????? repositorylname.innerHTML=data;
?}
?function displayRepositorylcontent(){
????????? var serviceUrl = serverUrl+"repositorylservlet?command=queryonerepositoryl&repositorylid=72";
????????? var params = "";
//????????? alert(serviceUrl);
????????? new net.ContentLoader(serviceUrl,showRepositorylcontent,null,"GET",params,null);
?}
?function showRepositorylcontent(){
????????? var data=this.req.responseText;
????????? repositorylcontent.innerHTML=data;
?}
//news
??????? function displayNews(){
????????? var serviceUrl = serverUrl+"newsservlet?command=doquery&displaynum=2";
????????? var params = "";
????????? new net.ContentLoader(serviceUrl,getNewsData,null,"GET",params,null);
?}
?function getNewsData(){
????????? var data3=this.req.responseText;
????????? news.innerHTML=data3;
?}
??????? //
??????? function displayService(){
????????? var serviceUrl = serverUrl+"serviceservlet?command=doquery&displaynum=4";
????????? var params = "";
????????? new net.ContentLoader(serviceUrl,getServiceData,null,"GET",params,null);
?}
?function getServiceData(){
????????? var data5=this.req.responseText;
????????? service.innerHTML=data5;
?}
?//add to the stroe
?function addStore(){
??var serviceUrl = serverUrl+"repositoryldetailservlet?command=addStore&repositorylid=72";
????????? var params = "";
????????? new net.ContentLoader(serviceUrl,showAddStore,null,"GET",params,null);
?}