js怎么根据后台的value值获取对应的name 语言asp.net js

[lin_xb]

<p id="city_5">
<label>
所在地区</label>
<select class="prov" id="prov5" name="prov" data-code ="<%=pId %>">
</select>
<select class="city" id="city5" name="city" data-code ="<%=pId %>">
</select>
<select class="dist" id="area5" name="area" data-code ="<%=pId %>">
</select>
</p>


js脚本是通过改变data-code的值来改变对应的name，现在后台通过数据库有对应的data-code，要怎么让data-code和name对应起来

[lin_xb]

JS不太懂，求教，后台处理或者js两种都行