jsj将字符串转成gb2312编码值

function gb2312(key) {
    var r = "";
    for (var i = 0; i < key.length; i++) {
        var t = key.charCodeAt(i);
        if (t >= 0x4e00 || t == 0x300A || t == 0x300B) {
            try {
                execScript("ascCode=hex(asc(\"" + key.charAt(i) + "\"))", "vbscript");
                r += ascCode.replace(/(.{2})/g, "%$1");
            } catch(e) {}
        } else {
            r += escape(key.charAt(i))
        }
    }
    return r;
}