[Javascript] Preview an image after browse the file

Preview an image after browse the file

Javascript in Page

function readURL(input) {

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

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

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

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

HTML in Page: 

<form id="form1" runat="server">
    <input type='file' id="upload" />
    <img id="image" src="#" alt="your image" />
</form>