function formatCurrency(num){
	num = (num||'0').toString().replace(/\$|\,/g,'');
	if(isNaN(num)) num = "0";
	if(num+0 == 0) return '$0';

	var sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);

	var cents = num%100;
	num = Math.floor(num/100).toString();

	if(cents<10) cents = "0" + cents;

	numlength = num.length;

	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+','+ num.substring(num.length-(4*i+3));

	return [
		'<span class="',
			sign?' pos':' neg',
			' l', numlength,
		'">',
			sign ? '' : '-',
			'$',
			num,
			'<i class="cents c'+cents+'">.', cents, '</i>',
		'</span>'
	].join('');
}