if (parseInt(navigator.appVersion.substring(0,1))>=3) { // 3.0 or greater.

splash1_on = new Image();
splash1_off = new Image();
splash1_off.src = 'images_base/splash_arrow_mout.png';
splash1_on.src = 'images_base/splash_arrow_mover.png';

splash2_on = new Image();
splash2_off = new Image();
splash2_off.src = 'images_base/splash_arrow_mout.png';
splash2_on.src = 'images_base/splash_arrow_mover.png';

splash3_on = new Image();
splash3_off = new Image();
splash3_off.src = 'images_base/splash_arrow_mout.png';
splash3_on.src = 'images_base/splash_arrow_mover.png';

splash4_on = new Image();
splash4_off = new Image();
splash4_off.src = 'images_base/splash_arrow_mout.png';
splash4_on.src = 'images_base/splash_arrow_mover.png';

}

function on(image) {
  if (parseInt(navigator.appVersion.substring(0,1))>=3) { // 3.0 or greater.
      imagesrc = eval(image + '_on.src');
      document[image].src = imagesrc;
  }
}

function off(image) {
  if (parseInt(navigator.appVersion.substring(0,1))>=3) { // 3.0 or greater.
      imagesrc = eval(image + "_off.src");
      document[image].src = imagesrc;
 }
}