text link to dropdown

I found this great code that does exactly what I need it to do, only it fills a dropdown menu with results based on a text link, and I would like to use a nother dropdown. Can someone help me with this, please?

Here is the script for the form:

<form name=”dynmenu_form”>
<a href=”javascript:void(null);” onClick=”FillList(0);return false”>Ford</a><br />
<a href=”javascript:void(null);” onClick=”FillList(1);return false”>Toyota</a><br /><br />
<select name=”models” style=”width: 160px” onChange=”if (this.selectedIndex != 0) {alert(this.options[selectedIndex].value);}”>
<option></option>
</select>
</form>

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