Pick Image AutoPreview

<script>
$(function(){
$('.i-file').live('change',function(){
    if(this.files && this.files[0] && this.files[0].type.match('image*')){
        var reader = new FileReader();
        reader.onload = function (e) {
        $('#imgPreview').prop('src', e.target.result).show();
        }
        reader.readAsDataURL(this.files[0]);
    }
    if (!String(this.files[0].name).match(/(?:gif|jpg|png|bmp)$/)) {
        alert('Harap pilih file gambar saja dengan format JPG, PNG, atau GIF');
        this.value='';
    }
});
})
</script>
<form action="" method="post" enctype="multipart/form-data">
<p><img id="imgPreview" style="display:none" width=150 align="middle" /><input type="file" class="i-file" name="img" /></p>
</form>