请教一个图片刷新问题

<DIV ID="oDiv" STYLE="position:absolute; left:270px;" >
        An Image - >
        <IMG SRC='http://community.csdn.net/images/CSDN_logo.GIF' />
    </DIV>
<BUTTON onclick="oDiv.style.filter=
        'progid:DXImageTransform.Microsoft.BasicImage(rotation=3)'">
    Rotate 270 degrees</BUTTON><BR/>
<BUTTON onclick="oDiv.style.filter=''">Clear Filter</BUTTON><BR/>