function popAd(jumpURL, cookieName, cookieValue, cookieExpires){
	if (GetCookie(cookieName) == null){
		var x = 225;
		var y = 215;
    	var xMax = (screen.width / 2), yMax = (screen.height / 2);
		var xOffset = xMax - x, yOffset = yMax - y;
		window.open(jumpURL,'KnowledgeBox','width=225,height=215,screenX=xOffset,screenY=yOffset,top='+yOffset+',left='+xOffset+'');
		SetCookie(cookieName,cookieValue,cookieExpires);
		//alert(parseInt(cookieExpires));
		}
	else{
		//alert('Cookie Exists');
		}
}

function SetCookie(name,value,expTime,domain) {
  expires = new Date();
  cycle = expires.getTime() + (parseInt(expTime));
  expires.setTime(cycle);
  document.cookie = name + "=" + escape (value) + 
  ((expires) ? "; expires=" + expires.toGMTString() : "")+
  ((domain) ? "; domain=" + domain : "");
}


function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie(name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
      return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break; 
  }
  return null;
}