The chat system will be in the game.  In order to focus the chat window, the user presses t.  He then types a message and enter sends it. 
 The message will only be in the game that the user is in.  The opposing team can see the chat message as well. 
  If he wants it just for the team, he presses y.  It will say [team] infront of it .  The chat will show the last 10 messages.  It will be positioned on bottom left of screen.  The chat input is at the bottom.  I want it to look similiar to world of warcrafts chat system.