coin animation

coin_animation.js

function animateCoins(from, to, cb) {
	var fromTop, fromLeft, toTop, toLeft;

	var cxTime      = 400,
		cxRadius    = 30,
		goMaxTime   = 1400,
		goMinTime   = 700,
		coins       = [];

	if (typeof from == "object") {
		fromLeft = from.x; fromTop  = from.y;
	}

	if (typeof to == "object") {
		toLeft = to.x; toTop  = to.y;
	}

	if (typeof from == "string" || from instanceof $) {
		var f    = $(from)[0].getBoundingClientRect();
		fromLeft = f.left; fromTop  = f.top;
	}

	if (typeof to == "string" || to instanceof $) {
		var t  = $(to)[0].getBoundingClientRect();
		toLeft = t.left; toTop  = t.top;
	}

	function getRandomInt(min, max) {
	    return Math.floor(Math.random() * (max - min + 1)) + min;
	}

    for (var i = 0; i <= 14; i++) {
        (function(index) {
            coins.push($('<img>', {
                "src": "coin.png",
                "class": 'fly_coin',
                "id": "coin_" + index
            }));
            coins[index]
                .appendTo('body')
                .css({
                    "top": fromTop ,
                    "left": fromLeft 
                })
                .animate({
                    "left": "+=" + getRandomInt(-cxRadius, cxRadius),
                    "top": "+=" + getRandomInt(-cxRadius, cxRadius),
                    leaveTransforms: true
                }, cxTime, function() {
                    $(this).animate({
                        "top": toTop,
                        "left": toLeft,
                        leaveTransforms: true
                    }, getRandomInt(goMinTime, goMaxTime), function() {
                        coins[index].remove();
                    });
                })

        })(i);
    }
    // navsyaki hanum enq mekel tesar mite lrvav mnac
    setTimeout(function() {
    	$('.fly_coin').remove();
    	cb && cb();
    }, cxTime + goMaxTime);
}