function popUp(URL) 
{
  window.open(URL, "logout", "toolbar=0,scrollbars=1,location=0,statusbar=1,menubar=0,resizable=1,width=772,height=450,left = 300,top = 75");
}

var infotext = "Friends highlighted grey are not clickable, because they do not have an usable hometown location stored in Facebook . \n\nThe markers on the map show the cities where you have friends. Click on the city marker to see a list of your friends in this city.\n\nTo get details of your friends, click either in the city marker list your friends name or click in the friends list your friends name.\n\nEnjoy MapYourBuddies!";