Wybrana opcja zmiany JQuery
$('select option[value=8272]').attr('selected', '');
Ganz404
$('select option[value=8272]').attr('selected', '');$("div.id_100 select").val("val2");
<select onchange="getval(this);">
<option value="1">One</option>
<option value="2">Two</option>
</select>
Run code snippetfunction getval(sel)
{
alert(sel.value);
}