怎样让弹出对话框居中显示

方法一:

<script>
function opW(){
var ye=window.open('','yexj00','width=400,height=200');
ye.moveTo((screen.availWidth-400)/2,(screen.availHeight-200)/2);
}
</script>
<input type=button value=打开居中的新窗口 hideFocus=true onclick="opW()">

有移动延迟

方法二:

ShowDialog(url)
{
var iWidth=300; //窗口宽度
var iHeight=200;//窗口高度
var iTop=(screen.height-iHeight)/2;
var iLeft=(screen.width-iWidth)/2;
open(url,"Detail","Scrollbars=no,Toolbar=no,Location=no,Direction=no,Resizeable=no,Width="+iWidth+" ,Height="+iHeight+",top="+iTop+",left="+iLeft);
}

这个比较好