function simpleFormatCurrency(num) {
      num = Math.floor(num*100+0.50000000001);
      cents = num%100;
      num = Math.floor(num/100).toString();
      return num+"."+cents;
    }

    function formatCurrency(num) {
      num = num.toString().replace(/\$|\,/g,'');
      if(isNaN(num))
        num = "0";
      sign = (num == (num = Math.abs(num)));
      num = Math.floor(num*100+0.50000000001);
      cents = num%100;
      num = Math.floor(num/100).toString();
      if(cents<10)
        cents = "0" + cents;
      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 (((sign)?'':'-') + '$' + num + '.' + cents);
    }