Lấy image trước khi upload

Phần Html

<a href="http://lesson8.blogspot.com/">http://lesson8.blogspot.com/</a>

<form id="form1" runat="server">
    <input type='file' id="inputFile" />
    <img id="image_upload_preview" src="http://placehold.it/100x100" alt="your image" />
</form>

Phần JS

    function readURL(input) {
        if (input.files && input.files[0]) {
            var reader = new FileReader();

            reader.onload = function (e) {
                $('#image_upload_preview').attr('src', e.target.result);
            }

            reader.readAsDataURL(input.files[0]);
        }
    }

    $("#inputFile").change(function () {
        readURL(this);
    });