zhoupuyue的专栏

  .imageuploadform{ width:450px; height:300px; position:absolute; left:50%; top:50%; border:1pt solid #000000; z-index:110; display:none; margin:-150px 0 0 -225px; } 注意margin的高度...

<div style="position:fixed;top:200px;right:0px;"></div>