css如何让页脚固定在底部

<div id="container">
    <div id="header">Header Section</div>
    <div id="page" class="clearfix">
        <div id="left">Left Sidebar</div>
        <div id="content">Main content</div>
        <div id="right">Right sidebar</div>
    </div>
    <div id="footer">Footer Section</div>
</div>

html,body {
  margin: 0;
  padding:0;
  height: 100%;
}
#container {
  min-height:100%;
  height: auto !important;
  height: 100%; /*IE6不识别min-height*/
  position: relative;
}
#header {
    background: #ff0;
    padding: 10px;
}
#page {
    width: 960px;
    margin: 0 auto;
    padding-bottom: 60px;/*等于footer的高度*/
}
#footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 60px;/*脚部的高度*/
    background: #6cf;
    clear:both;
}
/*=======主体内容部分省略=======*/