Javascript 問題

我想請問有冇人識得用javascript寫帳號申請

如當id name 多於12字完

email沒有@

password少於n個字完就出現錯誤等

2 Answers

Rating
  • HUNG
    Lv 7
    1 decade ago
    Favorite Answer

    下面是如果沒有輸入 password 或 username 的時候就出現錯誤。你的問題也類似,只需要 call 一個 check 長度的 function 如 Len(xx)<12,就可以了。

    <SCRIPT Language = javascript>

    <!-- below function is used for checking the input status

    function datacheck()

    {

    if(frmLogin.ID.value == "")

    {

    window.alert("Please input a student ID!");

    document.frmLogin.elements(0).focus();

    return;

    }

    if(frmLogin.Password.value == "")

    {

    window.alert("Please input a password!");

    document.frmLogin.elements(1).focus();

    return;

    }

    frmLogin.submit();

    }

    -->

    </SCRIPT>

  • 1 decade ago

    please do by yourself

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