function chkInput() {
    var message = "您尚有以下的欄位未填寫\n";
    var messages = "";
    userName    = document.leaveword.name;
    email   = document.leaveword.email;
    title   = document.leaveword.title;
    content = document.leaveword.content;
    code    = document.leaveword.code;
    
    if ( trim(userName.value) == '' ) {
        messages += "* 姓名\n";
    }
    
    if ( trim(email.value) == '') {
        messages += "* E-Mail\n";
    }

    if ( trim(title.value) == '') {
        messages += "* 問題主題\n";
    }
    
    if ( trim(content.value) == '') {
        messages += "* 問題內容\n";
    }
    
    if ( trim(code.value) == '') {
        messages += "* 驗證碼\n";
    }
    
    if (messages == "") {
        return true;
    } else {
        alert(message+messages);
        return false;
    }
}