js调用action

js
var scriptBlock = document.createElement("script");
function checkpassportnumber(){
var passportnumber = document.getElementsByName("passportnumber")[0].value;
if(passportnumber!=""&&passportnumber!=null){
scriptBlock.src = "<%=request.getContextPath() %>/material/commonJsp/yuexiu/bm/student.do?method=checkNumber&number="+passportnumber;
scriptBlock.charset = "gbk";
scriptBlock.type = "text/javascript";
scriptBlock.language = "javascript";
document.getElementsByTagName("head")[0].appendChild(scriptBlock);
scriptBlock.onreadystatechange = afterAdd;
}
}
function afterAdd(){
if("loaded" == scriptBlock.readyState){
var text = data.Student[0].returnValue;
if(text!="1"){
alert(text);
document.getElementsByName("passportnumber")[0].value=""
}
}
}
jsp




action

public ActionForward checkNumber(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {
try {
ZsStudentModel studentModel =new ZsStudentModel();
String number = request.getParameter("number");
String temp = studentModel.checkpassportnumber(number);
output(response,"var data = {'Student':[{'returnValue':'"+temp+"'}]};");
}catch(Exception e){
e.printStackTrace();
}
return null;
}

/**
* @param response
* @param temp
* @date:Mar 13, 2009
* @author:
* @version:1.0
*/
public void output(HttpServletResponse response,String temp){
try{
response.setContentType("text/html");
response.setCharacterEncoding("gbk");
OutputStream out =response.getOutputStream();
//String temp="var data = {'singleLogin':[{'returnValue':'"+msg+"'}]};";
out.write(temp.getBytes());
out.close();
}catch(Exception e){
e.printStackTrace();
}
}
}