클라이언트 파일 존재 확인

function fileCheck() {
             var fso, f, ts, s;
             try {
                            fso = new ActiveXObject("Scripting.FileSystemObject");
                            if(fso.FileExists(document.forms["test1"].fileName.value))
                                        alert("파일존재")
                            else
                                        alert("파일존재없음");
                    }
             catch(e) {
                    alert(e.message);
             }
}