if (document.images)
{
	scr = new Image(120, 40) ;
	scr.src = "graphic/buttons/scr_off.gif" ; 
	scr_on = new Image(120, 40) ;
	scr_on.src = "graphic/buttons/scr_on.gif" ;
	 
	dl = new Image(120, 40) ;
	dl.src = "graphic/buttons/dl_off.gif" ; 
	dl_on = new Image(120, 40) ;
	dl_on.src = "graphic/buttons/dl_on.gif" ;

	sc = new Image(120, 40) ;
	sc.src = "graphic/buttons/sc_off.gif" ; 
	sc_on = new Image(120, 40) ;
	sc_on.src = "graphic/buttons/sc_on.gif" ;

	tp = new Image(120, 40) ;
	tp.src = "graphic/buttons/tp_off.gif" ; 
	tp_on = new Image(120, 40) ;
	tp_on.src = "graphic/buttons/tp_on.gif" ;

}

function MouseOver(imageid, newid)
{
	if (document.images)
	{
		document.images[imageid].src=eval(newid + ".src");
	}
}