JS打印页面

     打印　整个html页面（PS：样式要写在页面里面才能打印（就是用内部样式）） 
            <a id="dayi" runat="server" href="javascript:printme()" target="_self">打印</a>
            <a id="fanhui" runat="server" href="javascript:history.back()" target="_self">返回</a>