多张图片，限制大小，格式.md

//判断图片大小和后缀 两张身份证照片大小

```javascript

$(".js_upFile").on("change",function(){

    //判断图片大小和后缀 两张身份证照片大小

        var val_ = $(this).val();

        var file_ = this.files;

        console.log(file_);

        var size_ = file_[0].size;

        console.log(size_);

        var size_M = size_ / (1024 * 1024);   //换成M单位，

        console.log(size_M);

        var newVal_ = val_.split(".");

        console.log(newVal_);

        var reg_suffix = /^(jpg|png)$/; //后缀限制

        var maxSize_ = 2; //最大2M

        if(val_==''||!reg_suffix.test(newVal_[newVal_.length-1])||size_M > maxSize_) {

            alert("请选择后缀为png,jpg,大小不超过2M的文件！");

            $(".js_upFile").val("");

            return false;

        }

});

 

var width_ = $(".show_picsize ").width();

    var height_ = $(".show_picsize ").height();

    console.log(width_);

    if(width_<200||height_<200){

        alert("请上传至少200*200的图片！");

        $("#upload-file").val("");

        return false;

    }

        $("form").ajaxSubmit({

            type: "POST",

            url: "/investManage/user/saveHeadIcon.do",

            dataType:'json',

            enctype: 'multipart/form-data',

            success: function(obj){

                console.log(obj);

                if(obj.login&&obj.status==1){

                    alert("上传成功");

                }else if(obj.login == false){

                    alert(obj.msg);

                    window.location.href = "login.html";

                }else{

                    alert(obj.msg);

                }

            }

        });

```