Javascript打印文件去除页眉页脚

var hkey_root,hkey_path,hkey_key;

    hkey_root="HKEY_CURRENT_USER";

    hkey_path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";

    //网页打印时清空页眉页脚

    function pagesetup_null() {

        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 pagesetup_default() {

        try {

            var RegWsh = new ActiveXObject("WScript.Shell")

            hkey_key = "header"

            RegWsh.RegWrite(hkey_root + hkey_path + hkey_key, "&w&b页码，&p/&P")

            hkey_key = "footer"

            RegWsh.RegWrite(hkey_root + hkey_path + hkey_key, "&u&b&d")

        } catch (e) {

        }

    }

    function doPrint(printDiv) {

        try{

            pagesetup_null();

            newwin = window.open("", "newwin", "height=" + window.screen.height + ",width=" + window.screen.width + ",toolbar=no,scrollbars=auto,menubar=no");

            newwin.document.body.innerHTML = document.getElementById(printDiv).innerHTML;

            newwin.window.print();

            newwin.window.close();

            pagesetup_default();

        }catch(e){}

    }