jquery根据一个值来选中select下的option实例代码

<script type="text/javascript">
$(document).ready(function(){
 var str="";
 str = '${conclusionTypeName}';
 $("#firstName option").each(function(){
 alert($(this).text());
 if($(this).text() == str){
 $(this).attr("selected",true);
 }
 }); 
});
 
</script>

<s:select id="firstName" name="id" list="nodeList" listKey="id" listValue="name" onchange="send()" headerKey="0" headerValue="---请选择结论词类型---" /><br/>