select box 선택되어져보이는 Jquery 소스

<select name="wr_7" required itemname="연료" class="inputbox_sel">

<option value=''>[선택]</option>

<option value='가솔린'>가솔린</option>

<option value='디젤'>디젤</option>

<option value='LPG'>LPG</option>

<option value='가솔린-LPG겸용'>가솔린-LPG겸용</option>

<option value='하이브리드'>하이브리드</option>

</select>

<script>$('select:[name=wr_7]').val('<?=$write[wr_7]?>');</script>