if (document.images)

	{
		
		off = new Image
		on = new Image
      	down = new Image
		off1 = new Image
		on1 = new Image
      	down1 = new Image
		off2 = new Image
		on2 = new Image
      	down2 = new Image
		off3 = new Image
		on3 = new Image
      	down3 = new Image
		off4 = new Image
		on4 = new Image
      	down4 = new Image
		
                

		off.src = "images/buthn.jpg"
        on.src = "images/butho.jpg"
		down.src = "images/buthd.jpg"
		off1.src = "images/butcn.jpg"
        on1.src = "images/butco.jpg"
		down1.src = "images/butcd.jpg"
		off2.src = "images/butun.jpg"
        on2.src = "images/butuo.jpg"
		down2.src = "images/butud.jpg"
		off3.src = "images/buton.jpg"
        on3.src = "images/butoo.jpg"
		down3.src = "images/butod.jpg"
		off4.src = "images/butan.jpg"
        on4.src = "images/butao.jpg"
		down4.src = "images/butad.jpg"
		
                
				
	}
	else

	{

	    off = ""
		on = ""
		down = ""
		off1 = ""
		on1 = ""
		down1 = ""
		off2 = ""
		on2 = ""
		down2 = ""
		off3 = ""
		on3 = ""
		down3 = ""
		off4 = ""
		on4 = ""
		down4 = ""
		
		
		document.butimg = ""
		document.butimg1 = ""
		document.butimg2 = ""
		document.butimg3 = ""
		document.butimg4 = ""
		

	}