<script type="text/javascript">
 $(function(){
 $('.agree_regi').click(function(){
 var phone = $.trim($("#phone").val());
 if(phone == ""){
 NewAlert(2,"请输入手机号",null);
 return false;
 }else{
  var reg = /^0?1[3|4|5|8|7][0-9]\d{8}$/;
  if (!reg.test(phone)) {
  NewAlert(2,"请输入有效的手机号码",null);
   return false;
  }
 }
 var data ={
 phone:phone,
 };
 
 $.ajax({
 type:"POST",
 url:"{:U('Register/PhoneFind')}",
 data:data,
 success:function(msg){
  if(msg=='0'){
  NewAlert(2,"手机号有误",null);
  }
  if(msg=='1'){
  NewAlert(2,"该手机号已经注册，请直接登录",null);
  }
  if(msg=='2'){
  location.href="/Register/Regowner?phone="+phone;
  }
  if(msg=='3'){
  location.href="/Register/Regnest?phone="+phone;
  } 
 }
 });
 });
 });
</script>

public function PhoneFind(){
 if(!empty(I('param.phone'))){ //I方法获取post提交的值
  $phone = I('param.phone');
  $user = M("cuser");
  $res=$user->where(array('phone' =>$phone))->find(); //去数据库查询一条，并以数组返回
  if (!empty($res['password'])) {
  $status=1;//密码存在，用户直接登录
  }elseif(!empty($res)){
  $status=2;//存在，没有密码，设置密码，是业主
  }else{
  $status=3;//不存在，是游客，注册
  }
 }else{
  $status=0;//手机号有误
 }
 $this->ajaxReturn($status);     //返回状态值给前台
 }