A basic jQuery/Javascript counter to counts up to a certain number within a certain time period.

jQuery Counter

// target: The jQuery/Javascript element that you want the function to affect
// targetNumber: The max number you want the counter to get to
// type: Type of units the function outputs; can be modifed
// currentNumber: The number you would like to start from; leave undefined to start from zero

function countUp(target, targetNumber, type, currentNumber) {
	var integer,
		interval = (3 / targetNumber) * 1000; // 3 is the amount of time to give the counter to reach its desired amount

	if (currentNumber === undefined) {
		integer = 0;
	} else {
		integer = currentNumber;
	}
	if (integer !== targetNumber) {
		setTimeout(function() {
			if (interval <= 50) {
				integer = integer + 2;
			} else {
				integer = integer + 1;
			}
			if (type === 'percent') {
				target.html(integer + '%');
			} else if (type === 'dollars') {
				target.html('$' + integer);
			}
			countUp(target, targetNumber, type, integer);
		}, interval);
	}
}