Multi-Search

<script type="text/javascript">
function dosearch() {
var sf=document.searchform;
var submitto = sf.sengines.options[sf.sengines.selectedIndex].value + escape(sf.searchterms.value);
window.open(submitto);
return false;
}
</script>

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<form name="searchform" onSubmit="return dosearch();">
            <input id="search" type="text" name="searchterms" placeholder="Placement ID">
            <input id="submit" type="submit" name="SearchSubmit" value="Go!">
                <select id="option" name="sengines">
                    <option value="SEARCH_QUERY_URL">Choice 1</option>
                    <option value="SEARCH_QUERY_URL">Choice 2</option>
                    <option value="SEARCH_QUERY_URL">Choice 3</option>
                </select>
        </form>