image upload preview

<input type='file' name="image" onchange="preview(this);" multiple="multiple" />
<div id='previewImg'></div>

<script>
window.preview = function (input) {
    if (input.files && input.files[0]) {
        $(input.files).each(function () {
            var reader = new FileReader();
            reader.readAsDataURL(this);
            reader.onload = function (e) {
                $("#previewImg").append("<img class='thumb' src='"   e.target.result   "'>");
            }
        });
    }
}
</script>