Edit in JSFiddle

$('* div').each(function () {
    var item = $(this).text();
    var num = Number(item).toLocaleString('en');    

    if (Number(item) < 0) {
        num = num.replace('-','');
        $(this).addClass('negMoney');
    }else{
        $(this).addClass('enMoney');
    }
    
    $(this).text(num);
});

<h3>Format Currency</h3>

<!-- Format numbers to currency using a bit of JavaScript and CSS 
Source: http://ozkary.blogspot.com/ Date: 04/27/2014 -->
<div id="stmt0">250</div>
<hr/>
<div id="stmt1">2500</div>
<hr/>
<div id="stmt2">25000</div>
<hr/>
<div id="stmt3">-250009</div>
<hr/>
<div id="stmt4">2500000</div>
<hr/>

.enMoney::before {
    content:"$";
}
.negMoney {
    color:red;
}
div.negMoney::before {
    content:'($';
}
div.negMoney::after {
    content:')';
}