<select name="region[province]" id="" class="region valid">
<option value="0" selected="selected" tier="1">省、直辖市</option>
<option tier="1" value="2">北京市</option>
</select>
var province = $("select[name='region[province]']").val();
取得textarea的值
<textarea id='address'></textarea >
$("#textarea ").val()