打印代码

    <script type="text/javascript">
    function preview()
       {
           var bdhtml=window.document.body.innerHTML;
           var sprnstr="<!--startprint-->";
           var eprnstr="<!--endprint-->";
           var prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);
            prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));
            window.document.body.innerHTML=prnhtml;                  
            window.print();            
            location.reload();         
       }       
    </script>

<input id="btnPrint" type="button" value="打 印" onclick="preview();" class="button2" />

    <!--startprint-->
这里填写 你要打印的代码
<!--endprint-->