Form Validation Problem

[zylle]

Hello,
I am fairly new to coding and have come across something I cannot figure out. My page has a text box for a zip code then a drop down list that will take the user to a specific application page. I got the code working correctly for the form redirect and to pass the zip code that is entered in the text box. My problem is this: If the user does not enter a zip code the current text box value "Enter Zip Code" is passed along, which our application won't accept so the page results in a Site Error.
I need to know how to replace the current field value with nothing if the user does not enter a zip code. We do not want to force them to enter a zip. The pages are ASPX.

My code looks like this so far:

<script runat="server">
  string zip_code;

  public void Page_Load(Object sender, EventArgs e)
  {
		string script = "function redirectMenu(){var zip=document.getElementById('zip_code'); var location=document.redirect.menu.options[document.redirect.menu.selectedIndex].value; if (zip.value != null) location=location+'&ZipCode='+zip.value; window.location.href=location;}";
		Page.ClientScript.RegisterClientScriptBlock( this.GetType(), "redirectMenu", script, true );
  }
</script>

with the text field set up this way:

<input id="zip_code" type="text" tabindex="1" size="18" onfocus="javascript:this.value=''; this.maxLength='5';" value="Enter Zip Code" class="formtext" />

Thank You so much for your help

[gits]

hi ...

give the input-node an id and use the forms onsubmit handler to call a function like this:

[CODE=javascript]function chk_submit() {
var node = document.getEle mentById('your_ input_id');

if (/^Enter/.test(node.valu e)) {
node.value = '';
}
}
[/CODE]
kind regards

[zylle]

Hello,
Thanks for the suggestion. I actually ended up working out a script on my own. I will post it here incase anyone else is facing this same issue:

<script language=JavaScript>
<!-- 
function clear_textbox()
{
if (document.get_quotes.zip_code.value == " Enter Zip Code ")
document.get_quotes.zip_code.value = "";
} 
-->
</script>

Thanks again for the help, I have learned so much from these forums, Keep up the great work!

[gits]

glad to hear you got it working ...

a note:

the language attribute is deprecated you should use:

[HTML]<script type="text/javascript">[/HTML]
and leave the comments out

<!-- -->

there is no need for them.

kind regards