jquery二级联动查询问题

快跑蜗牛哥 2012-12-13 09:13:24

代码如下：
要求点击选择主菜单后，点击查询按钮
副菜单中因对应的是主菜单的值，

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script> 

<script type="text/javascript" language="javascript"> 

$(function(){

   $("#dropLang").unbind("change", eDropLangChange).bind("change", eDropLangChange); 

   $("#dropFrame").unbind("change", eDropFrameChange).bind("change", eDropFrameChange); 

});

var eDropLangChange = function(){

  var selectedValue = $(this).val(); 

  $("#dropFrame").children("span").each(function(){

    $(this).children().clone().replaceAll($(this)); 

  });

  if(parseInt(selectedValue) != 0){

    $("#dropFrame").children("option[parentid!='" + selectedValue + "'][value!='0']").each(function(){ 

      $(this).wrap("<span style='display:none'></span>");

    }); 

  }

};

var eDropFrameChange = function(){

  $("#dropLang").val($(this).children("option:selected").attr("parentid")); 

}; 

</script> 

</head> 

<body> 

<%

  String dropLangs="",dropFrame="";

  if(request.getParameter("dropLang")!=null&&request.getParameter("dropLang")!=""){

  dropLangs=request.getParameter("dropLang");

  }

   if(request.getParameter("dropFrame")!=null&&request.getParameter("dropFrame")!=""){

  dropFrame=request.getParameter("dropFrame");

  }

  

%>

<form action='?' method='post'>



<select id="dropLang" name="dropLang"> 

<option  value="0">請選擇</option> 

<option value="1" <%if(dropLangs.equals("1")){out.print("selected");}%>>Javascript</option> 

<option value="2" <%if(dropLangs.equals("2")){out.print("selected");}%>>Java</option> 

<option value="3" <%if(dropLangs.equals("3")){out.print("selected");}%>>C#</option> 

</select> 

<select id="dropFrame" name="dropFrame"> 

<option  value="0">請選擇</option> 

<option value="1" parentid="1" <%if(dropFrame.equals("1")){out.print("selected");}%>>JQuery</option> 

<option value="2" parentid="1" <%if(dropFrame.equals("2")){out.print("selected");}%>>Prototype</option> 

<option value="3" parentid="2" <%if(dropFrame.equals("3")){out.print("selected");}%>>Struts</option> 

<option value="4" parentid="2" <%if(dropFrame.equals("4")){out.print("selected");}%>>Spring</option> 

<option value="5" parentid="2" <%if(dropFrame.equals("5")){out.print("selected");}%>>Velocity</option> 

<option value="6" parentid="2" <%if(dropFrame.equals("6")){out.print("selected");}%>>Hibernate</option> 

<option value="7" parentid="3" <%if(dropFrame.equals("7")){out.print("selected");}%>>ASP.NET MVC</option> 

<option value="8" parentid="3" <%if(dropFrame.equals("8")){out.print("selected");}%>>Castle</option> 

</select> 

<input type="submit" value="查詢">

</form>