上传文件时禁止其他的操作(也就是页面置灰)

怎样实现?

解决方案 »

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点击上传时触发事件添加DIV遮罩效果（最好把div放在iframe中防止select的问题）上传完毕再取消
<html>
<head>
<script>
function reSizeWindow()
{
var shadow = document.getElementById("shadow");
var dialog = document.getElementById("dialog");

shadow.style.width = parseInt(document.body.clientWidth) + parseInt(document.body.scrollLeft);
shadow.style.height = parseInt(document.body.clientHeight) + parseInt(document.body.scrollTop);

dialog.style.left = parseInt(document.body.clientWidth)/2 - parseInt(dialog.style.width)/2 + parseInt(document.body.scrollLeft);
dialog.style.top = parseInt(document.body.clientHeight)/2 - parseInt(dialog.style.height)/2 + parseInt(document.body.scrollTop);
}
function openWindow()
{
document.getElementById("shadow").style.display = "block";
document.getElementById("dialog").style.display = "block";

reSizeWindow();
}
function closeWindow()
{
document.getElementById("shadow").style.display = "none";
document.getElementById("dialog").style.display = "none";
}
</script>
<style type="text/css">
.dialogStyle
{
background:red;
position:absolute;
display:none;
text-align:right;
z-index:2;
}
.shadowStyle
{
position:absolute;
left:0px;
top:0px;
display:none;
filter:alpha(opacity=30);
opacity:0.3;
background:gray;
z-index:1;
}
</style>
</head>
<body style="margin:0px 0px 0px 0px;">
<input type="button" onclick="openWindow()" value="open" style="margin-left:100px;margin-top:100px;"/>
<div id="dialog" class="dialogStyle" style="width:200px;height:200px;">
<input type="button" value="close" onclick="closeWindow()"/>
</div>
<div id="shadow" class="shadowStyle">
</div>



<script>
window.onresize = function()
{
reSizeWindow();
}
window.onscroll = function()
{
reSizeWindow();
}
for(var i = 0;i < 100;i++)
{
document.write("<br/>"+i);
}
</script>
</body>
</html>