底部漂浮DIV

  .buttonDiv{background-color: #4e4f50;
            border: 2px solid #83ABD3;
            border-radius: 4px;
            -khtml-opacity: 0.5;
            -moz-opacity: 0.5;
            opacity: 0.7;
            filter: alpha(opacity=40);
            color: #f4f4f4;
            text-align:center; 
            position:fixed;
            width:97.2%; 
            bottom: 0%;
}

 <div  class="buttonDiv">
        <a href="javascript:void(0)" class="easyui-linkbutton" onclick="submitForm()" style="    padding: 1px 7px;">保存</a>
        <a href="javascript:void(0)" class="easyui-linkbutton" onclick="clearForm()" style="    padding: 1px 7px;">重置</a>
    </div>