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  1. #1
    New to the CF scene
    Join Date
    May 2012
    Thanked 0 Times in 0 Posts

    Javascript form validation before submission

    Hello there, I hope you might be able to help me with an issue I'm having getting a form to validate before submission. I've been trying to figure out where I'm going wrong but being relatively new to javascript I'm obviously missing something.

    I have a form which calls one of two validation scripts with onBlur for each field (I've only included one of each field, there are 8 fields in total in the form):

        <form name="submitrunnertime" action="http://......reflect.php" onsubmit="return valResultsForm();" method="post">
          <tr><td><label for="RunnerID">Runner ID</label></td>
    	<td><input type="text" name="RunnerID" size="5" maxlength="5" onBlur="valRange(RunnerID, 1, 99999, 'RunnerID_bk');" />
    	</td><td id="RunnerID_bk"><span></span></td></tr>
          <tr><td><label for="">Date (YYYY-MM-DD)</label></td>
    	<td><input type="text" name="Date" size="10" maxlength="10" onBlur="valExpression(Date, '^(19[0-9{2}|20[01][0-9])\-(0[1-9]|1[012])\-([012][0-9]|3[01])$', 'Date_bk', 'please use indicated format');" />
    	</td><td id="Date_bk"><span></span></td></tr>
     etc. etc.
        <input type="submit" name="submitrunnertime" value="submit">
    I've managed to get each individual field to validate as the form is filled in.

    Now, if I fill valResultsForm.js with a simple line return false; then the form refuses to submit as it should do, but if I try and re-run the validation of each field so that the form will only submit if all fields have been filled in correctly, even if I force valResultsForm to return a false result, the form still submits. I just can't figure out why it is doing this and it's driving me around the bend.

    valResultsForm looks like:

    function valResultsForm() {
        var res1 = valRange(RunnerID, 1, 99999, 'RunnerID_bk');
        var res2 = valExpression(Date, '^(19[0-9{2}|20[01][0-9])\-(0[1-9]|1[012])\-([012][0-9]|3[01])$', 'Date_bk', 'please use indicated format');
        if (res1 == true && res2 == true) {
    	return true;
        else { return false; }
    Any hints or advice that anyone could give me would be hugely appreciated.

    Thank you, Andrew

  2. #2
    Regular Coder
    Join Date
    Jun 2002
    Flint, Michigan, USA
    Thanked 23 Times in 23 Posts
    Please tell us what those two validation routines (valRange, valExpression) look like.
    Having said that, I've probably told you more than I know.


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