// 0 popup disabled, 1 popup enabled;
var popupStatus = 0;

// loading popup
function loadPopup() {
	if (popupStatus == 0) {
		$("#backgroundPopupCart").css({
			"opacity": "0.7"
		});
		$("#backgroundPopupCart").fadeIn("slow");
		$("#popupCart").fadeIn("slow");
		$("#popup_cart_artikel").load("test");
		popupStatus = 1;
	}
}

// disabling popup
function disablePopup() {
	if (popupStatus == 1) {
		$("#backgroundPopupCart").fadeOut("slow");
		$("#popupCart").fadeOut("slow");
		popupStatus = 0;
	}
}

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