if(navigator.appVersion.charAt(0) >= 3) {
var img = new Array();

img[1] = new Image();  img[1].src="/hashi/img/top.gif"; 
img[2] = new Image();  img[2].src="/hashi/img/top_on.gif"; 
img[3] = new Image();  img[3].src="/hashi/img/twenty.gif"; 
img[4] = new Image();  img[4].src="/hashi/img/twenty_on.gif"; 
img[5] = new Image();  img[5].src="/hashi/img/hundred.gif"; 
img[6] = new Image();  img[6].src="/hashi/img/hundred_on.gif"; 
img[7] = new Image();  img[7].src="/hashi/img/type.gif"; 
img[8] = new Image();  img[8].src="/hashi/img/type_on.gif"; 


}
function change_image(nam,num) {
  if(navigator.appVersion.charAt(0) >= 3) {
    document.images[nam].src = img[num].src;
  }
}