var divheight = 20;
var tempheight;

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

function setVisibility(numItems){
	
	
	var listId = readCookie('ChinaDinerEventId');
	if (listId == null) {listId = 0;}

	for (i=0; i<numItems; i++){
		divId = "menuId" + i;
		tempheight = document.getElementById(divId).offsetHeight;
		if (tempheight > divheight){divheight = tempheight;}
	}
	
	for (i=0; i<numItems; i++){
		divId = "menuId" + i;
		document.getElementById(divId).style.display = "none";
	}
	divId = "menuId" + listId;
	document.getElementById(divId).style.display = "block";
	document.getElementById("events").style.height = divheight + 50 + "px";
}

function seteventscookie(listId, numItems) {
	
	document.cookie = 'ChinaDinerEventId=' + listId + '; path=/';
	setVisibility(numItems);
}