Show Currency Type on 'keyup'

Show US Dollar, Pound Sterling, Euro based on abbreviation entered in text box.

by bmarsh123

HTML

<div>
    <label>Enter Currency:</label>
    <input type="text" maxlength="3" id="txt" />
    <label id="lbl"></label>
</div>

JavaScript

$('#txt').keyup(function() {
    $(this).val($(this).val().toUpperCase());
    if ($(this).val().length == 3) {
        getCurrency($(this).val().toLowerCase());
    } else {
        $('#lbl').html('');
    }
});

function getCurrency(val) {
    $('#lbl').empty();
    if (val == 'usd') {
        $('#lbl').html('This is US dollars.');
    } else if (val == 'gbp') {
        $('#lbl').html('This is Pound Sterling.');
    } else if (val == 'eur') {
        $('#lbl').html('This is Euro.');
    } else {
        $('#lbl').html('Currency not known.');
    }
}