Question

Form Checking: Field must have minimum length

Asked by: calvinclose

I have virtually no JS experience (I am a PHP programmer), so pardon my ignorance.

I just want some JS to check one field has at least 3 (non-whitespace) characters, if not, show an Alert Box with an error message.

Here is an extract of my JS:

<script language="javascript" type="text/javascript">

      function MinLengthEntry(val, len, str)
      {
            if(val.length < len)
            {
                  alert(str);
                  return false;
            }
            return true;
      }

      function ValidateData()
      {
            val = document.form_search.part_number.value;
            val = val.replace(/(^\s*)|(\s*$)/g);
            return MinLengthEntry(val, 3, "You must enter at least 3 characters in the Part Number field!");
      }

</script>

The Submit button code is:

<INPUT TYPE="SUBMIT" NAME="search" VALUE="Search" ID="Forms Button2" onSubmit="return ValidateData();">

Where is my error?

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Asked On: 2006-03-30 at 09:44:42ID21795597
Tags: length
,; minimum
,; javascript
,; field
Topic: JavaScript
Participating Experts: 4
Points: 500
Comments: 12

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