Help me please with this code

Hi,

I need to change the drop-down box in this code with checkboxes and I dont know how. Please help me...
Replace the "option value="www.javascriptkit.com"" for a checkbox and so one...

Thank you in advance

<script type="text/javascript">

function Gsitesearch(curobj){
var domainroot=curobj.domainroot[curobj.domainroot.selectedIndex].value
curobj.q.value="site:"+domainroot+" "+curobj.qfront.value
}
</script>


<form action="http://www.google.com/search" method="get" onSubmit="Gsitesearch(this)">

<p>
<input name="q" type="hidden" />
<input name="qfront" type="text" style="width: 180px" /> <input type="submit" value="Search" /><br />
Search:
<select name="domainroot">
<option value="www.javascriptkit.com" selected="1">JavaScript Kit</option>
<option value="www.dynamicdrive.com">Dynamic Drive</option>
<option value="www.freewarejava.com">FreewareJava.com</option>
</select>
</p>

</form>


RAN

If you change the dropdown to checkboxes, then the user can select multiple sites and it will mess up the Google site search. AFAIK, you can only put one site in a Google site search.

Radio buttons, perhaps?