Hello,

I am hoping someone can help me with following search form.

As you can see I have created a form but I don't know how to fix the coding so when a user select a category it will add a different hidden filed for that option for example:
When the user selects category "Men" the hidden filed
Code:
<INPUT TYPE="HIDDEN" NAME="REFERRER" VALUE="http://men.com/acatalog/">
automaticly will be added the search



and when the user selects category "Kids" the hidden filed
Code:
<INPUT TYPE="HIDDEN" NAME="REFERRER" VALUE="http://kids.com/acatalog/">
automaticly will be added to the search



and so on...

Here is my form coding I am using:
Code:
<form name="simplesearch" method="get" action="" onsubmit="ssite=document.getElementById('sitelist');this.action=ssite.options[ssite.selectedIndex].value;return true;">			
 		<input type="hidden" name="page" value="search" />
        <input type="hidden" name="PR" value="-1" />
        <input type="hidden" name="TB" value="A" />
        <input type="hidden" name="NOLOGIN" value="1" /><input align="top" class="main_search_box" name="SS" type="text" value="search for ..." onfocus="this.value='';">
Search within: 
<select id="sitelist">
<option value="">Select Catagory</option>
<option value="http://kids.com/cgi-bin/ss000001.pl">kids</option>
<option value="http://men.com/cgi-bin/ss000001.pl">men</option>
<option value="http://women.com/cgi-bin/ss000001.pl">women</option>
</select><input type="submit" class="button" name="ACTION" value="Go!">
</form>
Also I have one more question how do I make the "Select Catagory" a Must Choose and if not chosen to give message that say"Please Select a Category"


Thank you in advance for any help you can give me...
I am a bigginer so please go easy on me