if  ((document.getElementById) && 
window.addEventListener || window.attachEvent){

(function() {
	

/* Define the number of snowflakes to be used in the animation */
const SNOWFLAKES = 10;

/*
	Receives the lowest and highest values of a range and
	returns a random integer that falls within that range.
*/
function randomInteger(low, high) {
	return low + Math.floor(Math.random() * (high - low));
}

/*
   Receives the lowest and highest values of a range and
   returns a random float that falls within that range.
*/
function randomFloat(low, high) {
	return low + Math.random() * (high - low);
}

function randomItem(items) {
	return items[randomInteger(0, items.length - 1)]
}

/* Returns a duration value for the falling animation.*/
function durationValue(value) {
	return value + 's';
}

function createASnowflake(is_first) {
	var flakes = ['2746', '2745', '2744', '2733'];
	var superFlakes = ['2746', '2745', '2744', 'fc7', '274b', '2749', '2747', '2746', '273c', '273b', '2734', '2733', '2732', '2731', '2725'];
	var sizes = ['tiny', 'tiny', 'tiny', 'small', 'small', 'small', 'small', 'medium', 'medium', 'medium', 'medium', 'medium', 'medium', 'large', 'massive'];
	
	/* Start by creating a wrapper div, and an empty span  */
	var snowflakeElement = document.createElement('div');
	snowflakeElement.className = 'snowflake ' + randomItem(sizes);
	
	var snowflake = document.createElement('span');
	snowflake.innerHTML = '&#x' + randomItem(flakes) + ';';
	
	snowflakeElement.appendChild(snowflake);
	
	/* Randomly choose a spin animation */
	var spinAnimationName = (Math.random() < 0.5) ? 'clockwiseSpin' : 'counterclockwiseSpin';

	 /* Randomly choose a side to anchor to, keeps the middle more dense and fits liquid layout */
	 var anchorSide = (Math.random() < 0.5) ? 'left' : 'right';

	/* Figure out a random duration for the fade and drop animations */
	var fadeAndDropDuration = durationValue(randomFloat(5, 11));

	/* Figure out another random duration for the spin animation */
	var spinDuration = durationValue(randomFloat(4, 8));
	
	// how long to wait before the flakes arrive
	var flakeDelay = is_first ? 0 : durationValue(randomFloat(0, 10));
	
	snowflakeElement.style.webkitAnimationName = 'fade, drop';
	snowflakeElement.style.webkitAnimationDuration = fadeAndDropDuration + ', ' + fadeAndDropDuration;
	snowflakeElement.style.webkitAnimationDelay = flakeDelay;
	
	/* Position the snowflake at a random location along the screen, anchored to either the left or the right*/
	snowflakeElement.style[anchorSide] = randomInteger(0, 60) + '%';
	
	snowflake.style.webkitAnimationName = spinAnimationName;
	snowflake.style.webkitAnimationDuration = spinDuration;
	

	/* Return this snowflake element so it can be added to the document */
	return snowflakeElement;
}

//var link = document.createElement('link');
//link.type='text/css';
//link.href='flakes.css';
//link.rel='stylesheet'; 
//document.getElementsByTagName('head')[0].appendChild(link);

/* Fill the empty container with freshly driven snow */
var first = true;
for (var i = 0; i < SNOWFLAKES; i++) {
	document.body.appendChild(createASnowflake(first));
	first = false;
}
})();
}