button_off=new Image(61,15);
button_off.src="images/button_off.gif";
button_on=new Image(61,15);
button_on.src="images/button_on.gif";
button2_off=new Image(110,15);
button2_off.src="images/button2_off.gif";
button2_on=new Image(110,15);
button2_on.src="images/button2_on.gif";


	function lightOn(imgName)
	{
		document[imgName].src=eval(imgName+"on.src")
	}
	
	function lightOff(imgName)
	{
		document[imgName].src=eval(imgName+"off.src")
	}