if (document.images) {
	var twit_on = new Image();
	var twit_off = new Image();
	var fb_on = new Image();
	var fb_off = new Image();
	var email_on = new Image();
	var email_off = new Image();
	
	var home_on = new Image();
	var home_off = new Image();
	var art_on = new Image();
	var art_off = new Image();
	var cards_on = new Image();
	var cards_off = new Image();
	var wri_on = new Image();
	var wri_off = new Image();
	var abt_on = new Image();
	var abt_off = new Image();

	twit_on.src = "../btns/twit_on.gif";
	twit_off.src = "../btns/twit_off.gif";

	fb_on.src = "../btns/fb_on.gif";
	fb_off.src = "../btns/fb_off.gif";

	email_on.src = "../btns/email_on.gif";
	email_off.src = "../btns/email_off.gif";

	home_on.src = "../btns/home_on.gif";
	home_off.src = "../btns/home_off.gif";
	
	art_on.src = "../btns/art_on.gif";
	art_off.src = "../btns/art_off.gif";
	
	cards_on.src = "../btns/cards_on.gif";
	cards_off.src = "../btns/cards_off.gif";

	wri_on.src = "../btns/wri_on.gif";
	wri_off.src = "../btns/wri_off.gif";

	abt_on.src = "../btns/abt_on.gif";
	abt_off.src = "../btns/abt_off.gif";
}

function btn_over(imgId)
{
   if ( document.images )
  {
    butOn = eval ( imgId + "_on.src" );
    document.getElementById(imgId).src = butOn;
  }
}

function btn_out(imgId)
{
  if ( document.images )
  {
    butOff = eval ( imgId + "_off.src" );
    document.getElementById(imgId).src = butOff;
  }
}