var sda = {

random : function(range) {
	return Math.floor(Math.random() * (range + 1));
},

timeToMax : function(value, min, max, time) {
	if (value < min) value = min;
	if (value > max) value = max;
	return time * (max - value) / (max - min);
},

timeToMin : function(value, min, max, time) {
	if (value < min) value = min;
	if (value > max) value = max;
	return time * (value - min) / (max - min);
},

resize : function(image) {
	var ratio = Math.max($(window).width() / image.width(), $(window).height() / image.height());
	if ($(window).width() > $(window).height()) {
		image.css({width: image.width() * ratio, height: 'auto'});
	} else {
		image.css({width: 'auto', height: image.height() * ratio});
	}
	image.css({left: ($(window).width() - image.width()) / 2, top: ($(window).height() - image.height()) / 2});
}

};