ThinkPHP + jquery easyui 1.4.1 做的一个登录页面，在chrome、FF等浏览器上是正常的，但是在IE兼容模式下，一提交Form就变成了下载文件了。
页面代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>BlueSky后台管理系统</title>
<load href='__PUBLIC__/jquery-easyui-1.4.1/themes/default/easyui.css' />
<load href='__PUBLIC__/jquery-easyui-1.4.1/themes/icon.css' />
<load href='__PUBLIC__/jquery-easyui-1.4.1/jquery.min.js' />
<load href='__PUBLIC__/jquery-easyui-1.4.1/jquery.easyui.min.js' />
<load href='__PUBLIC__/jquery-easyui-1.4.1/locale/easyui-lang-zh_CN.js' />
</head>
<body>
<div class="easyui-dialog" title="登录" data-options="iconCls:'icon-tip',closable: false" style="width:420px;height:200px;padding:10px;">
<div style="padding:10px 60px 20px 60px;">
<form id="ff" class="easyui-form" method="post" data-options="novalidate:true" action="__APP__/Admin/Index/login">
<table cellpadding="5">
<tr>
<td>用户名：</td>
<td><input class="easyui-textbox" type="text" name="name" data-options="required:true,prompt:'手机/邮箱/呢称'" ></input></td>
</tr>
<tr>
<td>密码：</td>
<td><input class="easyui-textbox" type="password" name="password" data-options="required:true"></input></td>
</tr>
</table>
</form>
<div style="text-align:center;padding:5px">
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="submitForm()">登录</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="clearForm()">清空</a>
</div>
</div>
</div>
<script>
function submitForm(){
$('#ff').form('submit',{
onSubmit:function(){
return $(this).form('enableValidation').form('validate');
},
success:function(data){
var d = $.parseJSON(data);
if(d.state==1){
window.location= d.url;
}else{
$.messager.alert('提示:', d.msg,'error');
}
}
});
}
function clearForm(){
$('#ff').form('clear');
}
//回车提交表单
$.parser.onComplete = function(){
$(".textbox-text").keyup(function (e) {
if (e.keyCode == 13) {
submitForm();
}
});
};
</script>
</body>
</html>
PHP Controller：
<?php
namespace Admin\Controller;
use Admin\Model\UserModel;
use Think\Controller;
class IndexController extends Controller {
/*
* 登录
*/
public function login(){
$user = M("user");
$where["nickname"] = ":name";
$where["email"] = ":name";
$where["mobile"] = ":name";
$where["_logic"] = "OR";
$map["password"] = ":password";
$map['_complex'] = $where;
$bind[':name'] = I("post.name");
$bind[':password'] = I("post.password");
$list = $user->where($map)->bind($bind)->select();
if(count($list) == 1){
$currentUser = current($list);
$currentUser["lasttime"] = date('Y-m-d H:i:s',time());
session("user",$currentUser);
//保存最后登录时间
$user->field('lasttime,id')->save($currentUser);
$data["state"] = 1;
$data["url"] = U("Admin/Index/main");
$this->ajaxReturn($data);
}else{
$data["state"] = 0;
$data["msg"] = "用户名或密码不正确！";
$this->ajaxReturn($data);
}
}
}IE兼容模式点登录就变成下载文件了。
引起问题的原因应该是 easyui 1.4.1 不再支持IE6、7、8所致，经测试，解决问题的方法，是不用 ajaxReturn 方法返回数据，因为ajaxReturn 会在返回数据前添加 header 声明，我们直接用 echo或exit 之类的方法直接输出字符串就好了。
PHP Controller 修改如下：
<?php
namespace Admin\Controller;
use Admin\Model\UserModel;
use Think\Controller;
class IndexController extends Controller {
/*
* 登录
*/
public function login(){
$user = M("user");
$where["nickname"] = ":name";
$where["email"] = ":name";
$where["mobile"] = ":name";
$where["_logic"] = "OR";
$map["password"] = ":password";
$map['_complex'] = $where;
$bind[':name'] = I("post.name");
$bind[':password'] = I("post.password");
$list = $user->where($map)->bind($bind)->select();
if(count($list) == 1){
$currentUser = current($list);
$currentUser["lasttime"] = date('Y-m-d H:i:s',time());
session("user",$currentUser);
//保存最后登录时间
$user->field('lasttime,id')->save($currentUser);
$data["state"] = 1;
$data["url"] = U("Admin/Index/main");
exit(json_encode($data));
}else{
$data["state"] = 0;
$data["msg"] = "用户名或密码不正确！";
exit(json_encode($data));
}
}
}