Membuat List Menu Drop Down List OnClick Onchange Redirect di PHP

<select name="URL" onchange="ResetToDisabled(this);">
    <option disabled="disabled" selected="selected">Choose a County for Recycling Information.......</option>
    <option value="LINK">Ingham County (Google Map / PDF)</option>
    <option value="LINK">Clinton County (PDF)</option>
    <option value="LINK">Eaton County (PDF)</option>
</select>
<script type="text/javascript">
    function ResetToDisabled(DropDown) {
        var TargetIndex = DropDown.selectedIndex;
        DropDown.selectedIndex = 0;
        window.location.href = DropDown.options[TargetIndex].value;
    }
</script>

Sumber:

http://stackoverflow.com/questions/16301348/html-drop-down-list