if (document.images)
	{
		btn1a=new Image()
		btn1a.src="btn1.gif"
		btn1b=new Image()
		btn1b.src="btn1a.gif"
		
		btn2a=new Image()
		btn2a.src="btn2.gif"
		btn2b=new Image()
		btn2b.src="btn2a.gif"

		btn3a=new Image()
		btn3a.src="btn3.gif"
		btn3b=new Image()
		btn3b.src="btn3a.gif"

		btn4a=new Image()
		btn4a.src="btn4.gif"
		btn4b=new Image()
		btn4b.src="btn4a.gif"

		btn5a=new Image()
		btn5a.src="btn5.gif"
		btn5b=new Image()
		btn5b.src="btn5a.gif"

		btn6a=new Image()
		btn6a.src="btn6.gif"
		btn6b=new Image()
		btn6b.src="btn6a.gif"

		btn7a=new Image()
		btn7a.src="btn7.gif"
		btn7b=new Image()
		btn7b.src="btn7a.gif"
	}



function imgOff(imgName)
	{
		if  (document.images);
	{
		document[imgName].src = eval (imgName + "a.src");
	}
}

function imgOn(imgName)
	{
		if  (document.images)
	{
		document [imgName].src = eval (imgName + "b.src");
	}
}