ext 实现进度条效果

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<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<link rel="stylesheet" type="text/css" href="ext-3.0.0/resources/css/ext-all.css" />
<script type="text/javascript" src="ext-3.0.0/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext-3.0.0/ext-all-debug.js"></script>
<script type="text/javascript">

function start(){
Ext.MessageBox.alert("helloword",'Hello World',
function(btn){
alert('你刚刚点击了：'+btn);
});
}
Ext.onReady(start);

Ext.onReady (function(){
Ext.MessageBox.confirm('选择框','你到底选yes还是no',
function(btn){
alert('你刚刚点击了：'+btn)});

Ext.MessageBox.prompt('文本框','在这里输入内容')

Ext.MessageBox.show({
title:'标题',msg:'要显示的内容',
width:300,buttons:Ext.MessageBox.OKCANCEL,
multiline:true
});

Ext.MessageBox.show({
title:'标题',msg:'要显示的内容',
width:300,
progress:true,
closeable:false
});
var f = function(v){
return function(){
if(v==11){
Ext.MessageBox.hide();
}else{
Ext.MessageBox.updateProgress(v/10,v*100/10+'%');
}
};
};
for(var i=1;i<12;i++){
setTimeout(f(i),i*500);
}
});
</script>
</head>
<body>
<div id="toolbar"><input type="button" /></div>
</body>
</html>