javascript获取客户端默认打印机

JS

    <script language="javascript">
        function startRequest() {
            var oShell = new ActiveXObject("WScript.Shell");
            var sRegVal = 'HKEY_CURRENT_USER\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\Device';
            var sDefault = oShell.RegRead(sRegVal);
            return sDefault;
        }

        function Start (){
            var cpname = startRequest();
            alert(cpname);
        }
    </script>

html input调用Start方法

<input onclick="return Start();" type="button" value="获取客户端默认打印机"/>