incrementNumber = function($block, start, finish, duration) {
	if (typeof(start)=='undefined') {
		var start = 0;
		if ($block.text().trim()*1)
			start = $block.text().trim()*1;
	}
	for (var i=0; i<=duration/100; i++) {
		var nb = Math.round(finish/((duration/100)/i));
		setTimeout(function(nb) {
			$block.html(nb);
		}.bind(null,nb),i*100);
	}
}