var xmlhttp;
    function getData(termsName){
      //创建异步调用对象
      if(window.ActiveXObject){
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
      else if(window.XMLHttpRequest){
			xmlhttp=new XMLHttpRequest();
		}
      //将对象状态与事件相关联
      xmlhttp.onreadystatechange=statechange;
      //加载要链接的页面
      xmlhttp.open("POST","/SearchClassServlet?terms="+termsName,true);
      //发送请求
      xmlhttp.send();
    }
    
    function statechange()
    { var tdId;
      if(xmlhttp.readystate==4)
      {
        if(xmlhttp.status==200)
        { 
         if(xmlhttp.responseText==""){
          
         }
         else{
           var  classNameList=xmlhttp.responseText;
           var theClassName=classNameList.split(";");
           var theclearClassName=document.all.className;
           while(theclearClassName.options.length>0){
             theclearClassName.remove(theclearClassName.options.length-1);
           }
           
           for(var i=0;i<theClassName.length;i++){
            var op=window.document.createElement("OPTION");
                op.value=theClassName[i];
                op.innerHTML=theClassName[i];
                document.getElementById("className").appendChild(op);
           }
           
         } 
        }
      }
    } 
  function searchClassName(obj){
	  var termsName=obj.value;
	  getData(termsName);
  }
  function onsearchEntryMessage(){
     var termsName=document.getElementById("termsName").value;
     var className=encodeURI(document.getElementById("className").value);
     var studentName=encodeURI(document.getElementById("studentName").value);
     var schoolName=encodeURI(document.getElementById("schoolName1").value);
     var collegeName=encodeURI(document.getElementById("collegeName").value);
     document.getElementById("messageId").href="/entryMessageDetail.jsp?className="+className+"&collegeName="+collegeName+"&studentName="+studentName+"&schoolName="+schoolName+"&termsName="+termsName;
     document.getElementById("messageId").click();
  }