jquery selects the option instance code under select based on a value

How does jquery select the option under select based on a value

<script type="text/javascript">
$(document).ready(function(){
  var str="";
  str = &#39;${conclusionTypeName}&#39;;
  $("#firstName option").each(function(){
    alert($(this).text());
    if($(this).text() == str){
    $(this).attr("selected",true);
    }
  });   
});
 
</script>

Note: The red mark code represents a Chinese string passed from Action to the page (conclusionTypeName must be defined as global Variable, this expression can avoid the problem of Chinese garbled characters, and there is no need to transcode in Action)

<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/>

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