保存html代码

function svcode(F) {
        if (document.all) {
            var F = $id(F);
            var E = window.open("", "_blank", "top=10000");
            E.document.open("text/html", "replace");
            E.document.writeln(F.value);
            E.document.execCommand("saveas", "", "mb5u.htm");
            E.close()
        } else {
            var G = $id(F).value;
            if (G != "") {
                var H = window.open("", "", "");
                H.opener = null;
                H.document.write("<div style='margin-bottom:20px;background:#333; border-bottom:1px solid #000;color:#fff; height:30px; line-height:30px;text-align:center; font-size:12px;'>u540cu65f6u6309u4e0bCTRL+S,u5febu901fu4fddu5b58u5230u672cu5730!</div>" + G);
                H.document.close()
            }
        }
    }