Preview an image before it is uploaded

by Denise Nepraunig

HTML

<form id="form1" runat="server">
        <input type='file' id="imgInp" />
        <br>
        <img id="blah" src="http://i.imgur.com/zAyt4lX.jpg" alt="your image" height="100" />
    </form>

CSS

::-webkit-scrollbar-track
{
	-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.2);
	
	background-color: #F5F5F5;
}

::-webkit-scrollbar
{
	width: 6px;
	background-color: #F5F5F5;
}

::-webkit-scrollbar-thumb
{
	-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.2);
	background-color: #555;
}

JavaScript

function readURL(input) {
        if (input.files && input.files[0]) {
            var reader = new FileReader();
            
            reader.onload = function (e) {
                $('#blah').attr('src', e.target.result);
            }
            
            reader.readAsDataURL(input.files[0]);
        }
    }
    
    $("#imgInp").change(function(){
        readURL(this);
    });