function button(Name,File,tagle)
 {
  if (tagle)
        {
		  document.images[Name].src = eval(File + "off.src");
		  }
      else
        {document.images[Name].src = eval(File + "on.src");}
}
{
  but1on = new Image();
  but1on.src ="img-main/knss1a.gif";
  but1off = new Image();
  but1off.src ="img-main/knss1b.gif";
  but2on = new Image();
  but2on.src ="img-main/knss2a.gif";
  but2off = new Image();
  but2off.src ="img-main/knss2b.gif";
  but3on = new Image();
  but3on.src ="img-main/knss3a.gif";
  but3off = new Image();
  but3off.src ="img-main/knss3b.gif";
  but4on = new Image();
  but4on.src ="img-main/knss4a.gif";
  but4off = new Image();
  but4off.src ="img-main/knss4b.gif";
  but5on = new Image();
  but5on.src ="img-main/knss5a.gif";
  but5off = new Image();
  but5off.src ="img-main/knss5b.gif";
  but6on = new Image();
  but6on.src ="img-main/knss6a.gif";
  but6off = new Image();
  but6off.src ="img-main/knss6b.gif";
  but7on = new Image();
  but7on.src ="img-main/knss7a.gif";
  but7off = new Image();
  but7off.src ="img-main/knss7b.gif";
  but8on = new Image();
  but8on.src ="img-main/knss8a.gif";
  but8off = new Image();
  but8off.src ="img-main/knss8b.gif";
  but9on = new Image();
  but9on.src ="img-main/knss9a.gif";
  but9off = new Image();
  but9off.src ="img-main/knss9b.gif";
  but10on = new Image();
  but10on.src ="img-main/knss10a.gif";
  but10off = new Image();
  but10off.src ="img-main/knss10b.gif";
}