function ajaxFunction()
 {
 var xmlHttp;
 
 try
    {
   // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
 catch (e)
    {

   try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
   catch (e)
      {

      try
         {
         xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
         }
      catch (e)
         {
         alert('你的浏览器不支持ajax');
         return false;
         }
      }
    }
	
    xmlHttp.onreadystatechange=function()
      {
      if(xmlHttp.readyState==4)
        {
         var ret=xmlHttp.responseText;
         return ret;
        }
      }
    xmlHttp.open("post","middle.jsp",true);
    xmlHttp.send(null);
	
 }
 function resubmit(){
 if(check()){
 alert('ddd');
// var aaa=ajaxFunction();
// alert(aaa);
 }
 else{
 var variable="";
	if(login.value==null||login.value.length<4||login.value.length>6){
	variable+="登录名4-6字母或数字,且以字母开头\n";
	}
	if(password1.value==null||password1.value.length<4||password1.value.length>6){
    variable+="登录密码4-6字母或数字,且以字母开头\n";	}
	if(password1.value!=password2.value){
	variable+="用户名和密码不一致\n";
	}
	alert(variable);
 }
 }
分开界限
function openwindow(){
window.showModalDialog("increase.jsp");
window.location.href="user-manage.jsp";
}
function dropa(){

var log= $("#gridTable").jqGrid("getGridParam", "selrow");
//$.post("delete.jsp",{login:loginName},function(data){
//alert("aa");

//window.location.href="user-manage.jsp";
//});
if(null==log){
alert("删除数据无效,请你选中某一行进行删除");
}
else{
var sj=jQuery("#gridTable").jqGrid('getRowData',log);
var value=sj['loginName'];
$.post("delete.jsp",{login:value},function(data){
alert(data);
window.location.href="user-manage.jsp";
});
}
}
function updatea(){
var log= $("#gridTable").jqGrid("getGridParam", "selrow");
//$.post("delete.jsp",{login:loginName},function(data){
//alert("aa");

//window.location.href="user-manage.jsp";
//});
if(null==log){
alert("未进行任何修改,请你选中某一行进行修改");
}
else{
var sj=jQuery("#gridTable").jqGrid('getRowData',log);
var log=trim(sj['loginName']);
var use=trim(sj['userName']);
var sty=trim(sj['userStyle']);
var rem=trim(sj['remark']);
$.post("update.jsp",{lly:log,us:use,st:sty,re:rem},function(data){
window.location.href="user-manage.jsp";
alert(data)
});
}
}