ajax实例

  function login(o) {

        var username=$("#username").val();
        var password=$("#password").val();
        if(username==null||username==""){
            layer.alert("用户名不能为空");
        };
        if(password==null||password==""){
             layer.alert("密码不能为空");
        }
        var url='/api/login';
        $.ajax({
            type: "POST",
            async: false,
            url: url,
    dataType: "json",
            data:{
                username:username,
                password:password,
            },
            success:function (response) {
                if(response.code==0){

       
                    window.location.href = "index.html";
                }else{
                    layer.alert("登录失败，请重新登录");
                }
            },error:function (err) {
                layer.alert("登录失败，请重新登录");
            }