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如何修改下面的代碼,以便在進度條運行時能夠在框中添加居中的「加載...」消息的背景? IE瀏覽器。而進度條在DIV中的後臺運行,它會在盒子的中心顯示LOADING ...」。在進度條內添加一個居中的「加載...」消息
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var prg_width = 200;
var progress_run_id = null;
function progress() {
var node = document.getElementById('progress');
var w = node.style.width.match(/\d+/);
if (w == prg_width) {
clearInterval(progress_run_id);
w = 0;
alert("done")
} else {
w = parseInt(w) + 5 + 'px';
}
node.style.width = w;
}
function runit() {
progress_run_id = setInterval(progress, 30);
}
</script>
</head>
<body>
<div style="border: 1px solid #808080; width:200px; height:20px;">
<div id="progress" style="height:20px; width:0px; background-color:#DBDBDB;"/>
</div>
</div>
<p><a href="javascript:runit()">Start</a></p>
</body>
</html>