js获取html标签中的数据

 

<script type="text/javascript" src="js/jquery.js"></script>

<script type="text/javascript">
  
  function validate(){

 

  //一 ．是通过jDOM 
  // var attitudeObj = document.getElementById("attitude");   
   //var attitude = attitudeObj.innerHTML;  

//二 ．是通过jquery 
   var att = $("#attitude").text();//可以得到输入域中的内容
       var idnum = $("#idnum").val();   

   var name = $("#name").val();   
   var t_name =  $("#t_name").val() ;
   var pro_name =  $("#pro_name").val() ;

   // alert(att);
   if( name == null || name == "" ){
   
    alert("请输入毕业设计名称!");
    return false;
   }
   att   =   att.replace(/\s+/g,"");
   if( att == null || att == ""){
  
    alert("请输入选题须知！");
    return false;
   }
    if( t_name == null || t_name == "" ){
    alert("请选择教师!");
    return false;
   }
   if( pro_name == null || pro_name == ""){
    alert("请选择专业！");
    return false;
   }
   
  location="teacher/mainfra.jsp";
   //location="teacherAction_AddGraduationTitle.action?idnum=" + idnum +"&cname=" + cname +"&start=" + start+"&end=" + end;
   return true;
  }
 </script>
  </head>
 
  <body">
    <div >
         <div style="margin-left: 100px;">
      <!--   <form action="teacherAction_AddGraduationTitle.action" method="post" >-->
        <span>自动编号：</span><input type="text" readonly="readonly" name="idnum" id="idnum" style="background: gray;" value="<s:property value="#request.maxIdnum"/>"/><br/>
        <br/>
        <span>毕业设计名称：</span><input type="text" name="name" id="name"/><br/><br/>
              <span>所属教师：</span><select name="t_name" id="t_name">
        <option></option>
      <s:iterator value="teacherList">
       <option value="<s:property value='idnum' />"><s:property value="name" /></option>
      </s:iterator>
     </select> <br/> <br/> 
           <span>所属专业：</span><select name="pro_name" id="pro_name">
         <option></option>
      <s:iterator value="professionList">
       <option value="<s:property value='idnum' />"><s:property value="pro_name" /></option>
      </s:iterator>
     </select>     
    <br/>
     <br/>
     <span>选题须知：</span>
     <textarea id ="attitude" name="attitude" rows="3" cols="30" style="color: red;">
     </textarea>
     <br/>
        
        <br/>
        
        <input type="button" value="添加">  <input style="margin-left: 100px" type="reset" value="重置">
        
       <!-- </form> -->
      </div>
    </div>
  </body>