JS实现的浏览器打印代码

<script type="text/javascript">//设置网页打印的页眉页脚为空function pagesetup_null(){                            var  hkey_root,                 hkey_path,                 hkey_key;            hkey_root="HKEY_CURRENT_USER"            hkey_path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";            try{                            var RegWsh = new ActiveXObject("WScript.Shell");                            hkey_key="header";                        RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"");                        hkey_key="footer";                        RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"");                }catch(e){}        }function printView(oper){pagesetup_null(); if (oper < 10)  {  prnhtml=$("#body").html();window.document.body.innerHTML=prnhtml;window.print();  } else {  window.print();  }   }</script>