function donate() {
	$("#donation").click();
}

var popupStatus = 0;
function loadPopup() {
	// loads popup only if it is disabled
	if (popupStatus == 0) {
		$("#backgroundPopup").css({
			"opacity" : "0.7"
		});
		$("#backgroundPopup").fadeIn("slow");
		$("#popup").fadeIn("slow");
		popupStatus = 1;
	}
}

function disablePopup() {
	// disables popup only if it is enabled
	if (popupStatus == 1) {
		$("#backgroundPopup").fadeOut("slow");
		$("#popup").fadeOut("slow");
		popupStatus = 0;
	}
}

function centerPopup() {
	// request data for centering
	var windowWidth = document.documentElement.clientWidth;
	var windowHeight = document.documentElement.clientHeight;
	var popupHeight = $("#popup").height();
	var popupWidth = $("#popup").width();
	// centering
	$("#popup").css({
		"position" : "absolute",
		"top" : windowHeight / 2 - popupHeight / 2,
		"left" : windowWidth / 2 - popupWidth / 2
	});
	// only need force for IE6

	$("#backgroundPopup").css({
		"height" : windowHeight
	});

}

(function($){
	$.fn.shuffle = function() {
		return this.each(function(){
			var items = $(this).children();
			return (items.length)
			? $(this).html($.shuffle(items))
					: this;
		});
	};

	$.shuffle = function(arr) {
		for(
				var j, x, i = arr.length; i;
				j = parseInt(Math.random() * i),
				x = arr[--i], arr[i] = arr[j], arr[j] = x
		);
		return arr;
	};
})(jQuery);