jQuery number counter animation

I'm using this jQuery snippet to animate a data from notepad like number counter way.I just want it to display it randomly. Could someone show me how to modify it to get letters and numbers because the codde are only read numbers.

Asp.Net

"Label1" runat="server" Text="" Font-Names="Krona One" Font-Size="70"
ForeColor="#ffff00" class="Count">

JQuery

"text/javascript">
$('.Count').each(function () {
$(this).prop('Counter', 0).animate({
Counter: $(this).text()
}, {
duration: 2000,
easing: 'swing',
step: function (now) {
$(this).text(Math.ceil(now));
}
});
});