<script type="text/javascript">var xmlreq = false;  function createXmlHttpRequest(){          if (window.XMLHttpRequest) {          xmlreq = new XMLHttpRequest();            } else if (window.ActiveXObject) {            try {                                 xmlreq = new ActiveXObject("Msxml2.XMLHTTP");                      } catch (e1) {                                                                      try {                        xmlreq = new ActiveXObject("Microsoft.XMLHTTP");                        } catch (e2) {                                                          }                        }                }    return xmlreq;}function del(id){    var request = createXmlHttpRequest();    request.open("post","<%=path%>/StuServlet?methodName=delete&id="+id);    request.send();    request.onreadystatechange=function(){        if (xmlreq.readyState == 4)          {            if (xmlreq.status == 200)            {                    var check = xmlreq.responseText;                  show (check);

<TD><a href="javascript:void(0)" onclick="del(<%=id%>)">刪除</a></TD>

  public int delete(int i){        	Connection conn = new ConnectionUtil().openConnection();         	try{        		PreparedStatement ps = conn.prepareStatement(DELETE_STUDENT_SQL);         		ps.setInt(1,i);        		ps.executeUpdate();        		return 1;        	}catch(SQLException e){        		e.printStackTrace();        		        	}finally{        		try{        			conn.close();        		}catch(SQLException e){        			e.printStackTrace();        		}        	}			return 0;        }

private void delete(HttpServletRequest request, HttpServletResponse response) 			throws IOException {		// TODO Auto-generated method stub		int id =Integer.parseInt(request.getParameter("id"));		StudentDao dao =new StudentDaoImpl();		PrintWriter out = response.getWriter();				if(dao.delete(id)==1){			out.write("OK");		}		else{			out.write("NO");		}		//query(request, response);		out.close();	}