把层放在浏览器底部

<style type="text/css">
 .footer {
 background: url(../images/jxkh/footer.jpg);
 height: 50px;
 text-align: center;
 line-height: 15px;
 padding-top: 10px;
 width: 100%;
 position:fixed;bottom:0 ;_position:absolute;_margin-top:expression(this.style.pixelHeight+document.documentElement.scrollTop);
}
</style>
 
<div class="footer">&copy;版权所有 &nbsp;&nbsp;&nbsp;&nbsp;**在线软件开发有限公司 <br /> CopyRights  Reserged &copy;2012  </div>

.footer {

background: url(../images/jxkh/footer.jpg);

height: 50px;

text-align: center;

line-height: 15px;

padding-top: 10px;

width: 100%;

position:fixed;bottom:0 ;_position:absolute;_margin-top:expression(this.style.pixelHeight+document.documentElement.scrollTop);

}

</style>