if (document.images)
{
	var btn1on = new Image()
	btn1on.src = "images/btn_on/academic_on.gif"
	var btn1off = new Image() 
	btn1off.src = "images/btn_off/academic_off.gif"	
	
	var btn2on = new Image()
	btn2on.src = "images/btn_on/ecot_on.gif"
	var btn2off = new Image()
	btn2off.src = "images/btn_off/ecot_off.gif"
	
	var btn3on = new Image()
	btn3on.src = "images/btn_on/gap_on.gif"
	var btn3off = new Image()
	btn3off.src = "images/btn_off/gap_off.gif"
	
	var btn4on = new Image()
	btn4on.src = "images/btn_on/language_on.gif"
	var btn4off = new Image()
	btn4off.src = "images/btn_off/language_off.gif"	

	var btn5on = new Image()
	btn5on.src = "images/btn_on/volunteer_on.gif"
	var btn5off = new Image()
	btn5off.src = "images/btn_off/volunteer_off.gif"	
	
	var btn6on = new Image()
	btn6on.src = "images/btn_on/teach_on.gif"
	var btn6off = new Image()
	btn6off.src = "images/btn_off/teach_off.gif"	
}  

function inact(imgName)
{
	if (document.images)
	{		
      document.images[imgName].src = eval (imgName + 'off.src');
	  
	}
}

function act(imgName)
{
	if (document.images)
	{		
      document.images[imgName].src = eval (imgName + 'on.src');	
	}
}