jQuery addClass example
Change class name on click in jQuery
by Barbos
HTML
<stong>Регион</stong>
<select name="select" id="select" onchange="selectf(this)">
<option value="1" selected="selected">Мокс</option>
<option value="2">Мокс2</option>
<option value="3">Мокс3</option>
<option value="4">Мокс4</option>
</select>
JavaScript
function selectf(selectObject) {
var regid = selectObject.value;
window.alert(regid);
}