var popupStatus = 0;

//loading popup 
function loadPopup(){

	//loads popup only if it is disabled
	if(popupStatus==0){
	
		$("#backgroundPopup").fadeIn("slow");
		$("#popupwrapper").fadeIn("slow");
		popupStatus = 1;
	}
}

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

//centering popup
function centerPopup(){

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

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}