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/>