bootstrap初试进度条

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<div class="progress">
<div class="bar" style="width: 0%;"></div>
</div>

<!-- Bootstrap -->
<link href="../bootstrap/css/bootstrap.css" rel="stylesheet" media="screen">
<script src="http://code.jquery.com/jquery.js"></script>
<script src="../bootstrap/js/bootstrap.js"></script>
<script>
var p = 0;
$(function(){
run();
});
function run(){
p+=5;
$("div[class=bar]").css("width",p+"%");
if(p<100){
var timer=setTimeout("run()",500);
}else{
alert("加载完毕！");
}
}
</script>