Iterative through an array with a delay based on // http://stackoverflow.com/questions/12926531/javascript-delay-between-function-calls-for-each-index-in-an-array

iterateArrayWithDelay.js

function iterateArrayWithDelay(argsArr, delay, fn) {
    var index = 0;

    function next() {
        // protect against empty array
        if (!argsArr.length) {
            return;
        }

        // call the callback		
		fn(index, argsArr[index]);

        ++index;

		if(index != argsArr.length) {
			setTimeout(next, delay);
		}
    }
    // start the iteration
    next();
}

// test

function iterateArrayWithDelayTest() {
	var args = [5,4,3,2,1];
	
	iterateArrayWithDelay(args, 1000, function(i, num) {
		console.log("index: " + i + ", value: " + num);
	});
}