hi,all..i have this code:

var str = "KD-R435MUN2D";
var hasUD;
var patt1 = str.match(/U/gi);
var patt2 = str.match(/D/gi);

if (patt1 && patt2) {
    hasUD = 'UD';
} else {
    hasUD = false;
}

document.write(hasUD);

how to modify this code if i want search JD from var str="KD-S35JWD"..i try this but doesn't work:

<script type="text/javascript">

var str = "KD-R435jwd";
var hasUD;
var hasJD;
var patt1 = str.match(/U/gi);
var patt2 = str.match(/J/gi);
var patt3 = str.match(/D/gi);

if (patt1 && patt3) {
    hasUD = 'UD';
    document.write(hasUD);
} elseif (patt2 && patt3) {
    hasJD = 'JD';
    document.write(hasJD);
}

</script>