Drop down menu form

Drop down menu form

<div class="grid_3">
<h3>suzuki outboard range</h3>
<form method="post" id="form1" class="form1">
<label class="mb0">
<span>Select from menu below</span>
<select name="select">
<option value="">Browse Portable Range</option>
<option value="">Browse Midrange</option>
<option value="">Browse Hi-Performance Range</option>
</select>
</label>
<div class="clear"></div>
<a
onClick="document.getElementById('form1').submit()"href="http://suzukimarine.com.au/outboards/portables/"
target=_"blank" class="btn"> Search</a>
I need to add the 2 more url's to match the option values that appear in
the drop down list. If I add the urls, it give me the extra submit buttons
and I only want the 3 options from the menu with 1 submit button. I'm not
real good at this stuff.