Hi!

How can I create on my site an error message when the user submits an invalid zip code?

For example, in this site: carinsurancequotes.com , if I submit the zip code 99999 I get an error message: Please enter a valid zip code.

 

This is the code on my site:

 

<form action="the next page" method="get" name="form">
<input type="text" name="zipcode" maxlength="5" id="zipcode" />
<br />

<input type="submit" name="search" id="button" value=""/>
</form>

 

Thanks,

Steve

Compare the given zipcode against a database of zipcodes?