<!--
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"	
        
        
        }

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

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