if (parseInt(navigator.appVersion) >= 3) {

 point1_off = new Image;
 point1_off.src = "images/point_off.gif";
 point1_on = new Image;
 point1_on.src = "images/point_on.gif";

 point2_off = new Image;
 point2_off.src = "images/point_off.gif";
 point2_on = new Image;
 point2_on.src = "images/point_on.gif";

 point3_off = new Image;
 point3_off.src = "images/point_off.gif";
 point3_on = new Image;
 point3_on.src = "images/point_on.gif";

 point4_off = new Image;
 point4_off.src = "images/point_off.gif";
 point4_on = new Image;
 point4_on.src = "images/point_on.gif";

 point5_off = new Image;
 point5_off.src = "images/point_off.gif";
 point5_on = new Image;
 point5_on.src = "images/point_on.gif";

 point6_off = new Image;
 point6_off.src = "images/point_off.gif";
 point6_on = new Image;
 point6_on.src = "images/point_on.gif";

}

 function img_act(img_name) {
      if (parseInt(navigator.appVersion) >= 3) {
           img_on = eval(img_name + "_on.src");
           document [img_name].src = img_on;
      }
 }


 function img_inact(img_name) {
      if (parseInt(navigator.appVersion) >= 3) {
           img_off = eval(img_name + "_off.src");
           document [img_name].src = img_off;
      }
 }