IE浏览器下的AlphaImageLoader滤镜会导致该区域内的链接，按钮，输入框无法点击或者输入
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<div style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/logo.jpg',sizingMethod='scale');">
<a href="/">Web开发网</a>
<table width="546" border="0" cellpadding="0" cellspacing="0" height="100px">
<tr class="tittr">
<td > <form><input type="text" name="username"/></form></td>
</tr>
</table>
</div>
链接或按钮添加：position:relative样式使其相对定位，参考这个：http://www.w3dev.cn/article/20121109/Microsoft.AlphaImageLoader-filter-cause-a-input-disabled.aspx