<div class="upload" >
    <form><input type="file" id="xFile" style="position:absolute;clip:rect(0 0 0 0);"></form>
    <label for="xFile" id="car_upload"> <img src="__PUBLIC__/self/images/upload.png" ><br><br>点击上传</label>

</div>

$(function() {
    $("#xFile").change(function() {
       // img_data = $("#xFile").get(0).files[0];
        var fd = new FormData();
        fd.append("upload", 1);
        fd.append("Filedata", $("#xFile").get(0).files[0]);
        $.ajax({
            url: '/Home/Upload',  //server script to process data
            type: 'POST',
            data: fd,
            processData: false,
            contentType: false,
            beforeSend: function (XMLHttpRequest) {
                $("#loading1").show();
            },
            success: function (r) {
               // console.log(r);
                if (r.ret == 0) {
                    $("#idcard_url").val(r.savepath);
                    $("#idcard_urls").attr("src", r.savepath);
                } else {
                    alert('上传失败');
                }
                $("#loading1").hide();
            },
        });
    });