// Button definitions for normal CAT document types

  // Preload the images

	// create3StateBtn returns an array of 3 Image objects.
	// Netscape doesn't seem to like arrays.  They sometimes don't
	// load the buttons until you click several times quickly.  Separate
	// variables may be better.

	var sl_socialBtn = create3StateBtn("SL_social", 125, 28);
	var sl_scienceBtn = create3StateBtn("SL_science", 125, 28);
	var sl_languageBtn = create3StateBtn("SL_language", 125, 28);
	var sl_mathBtn = create3StateBtn("SL_math", 125, 28);
	var sl_joinBtn = create3StateBtn("SL_join", 92, 46);
  	var sl_freeBtn = create3StateBtn("SL_free", 92, 46);