Form Validation - dropdown and input box

Pr0ject · Mar 19, 2002

Odd request... but need help. I have a database populated drop down menu that a user will select from. In the event the drop down does not have what they are looking for, there is an input box they can fill out before submission.

What I need is a way to validate that if someone mistakenly makes a selection AND puts something in the input box, it errors out.

Can this be done?

DoubleV · Mar 19, 2002

take a look at this:

Code:

<html>
<head>
<title>menu</title>
<script language=&quot;javascript&quot;>
function validate() {
 if( (document.frm.nmbr.selectedIndex != 0) && (document.frm.txt.value.length != 0)) {
  alert(&quot;you cannot do both&quot;)
 } 
}
</script>
</head>
<body>

<form name=&quot;frm&quot;>
    <select name =&quot;nmbr&quot;>
    <option>Please select a number
    <option>one
    <option>two
    <option>three
    </select>
    <br>
    <input type=&quot;text&quot; name=&quot;txt&quot;>   
    <input type=&quot;button&quot; name=&quot;valid&quot; value = &quot;Validate&quot;
    onClick=&quot;validate()&quot;>
</form>

</body>
</html>

there's just one note there. Even if a use does not choose any options from the drop down, the first one is gonna be shown to them and in JS land it means that the first option is actually selected i.e. chosen.
that's why I have the first option as a generic statement and not an actual choice. --------------------------------------------------
Goals are dreams with deadlines

Pr0ject · Mar 19, 2002

you rock! That should work... at least steers me in the right direction. Thanks!

Pr0ject · Mar 20, 2002

one last thing... I already have the form named something specific in order to check a field for non alphanumeric characters... how do I circumvent the name="" when it's already assigned for another javascript function?

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Form Validation - dropdown and input box

Pr0ject

IS-IT--Management

DoubleV

Programmer

Pr0ject

IS-IT--Management

Pr0ject

IS-IT--Management

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