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

img[1] = new Image();  img[1].src="../images/menu_1.jpg"; 
img[2] = new Image();  img[2].src="../images/menu_1over.jpg"; 
img[3] = new Image();  img[3].src="../images/menu_2.jpg"; 
img[4] = new Image();  img[4].src="../images/menu_2over.jpg"; 
img[5] = new Image();  img[5].src="../images/menu_3.jpg"; 
img[6] = new Image();  img[6].src="../images/menu_3over.jpg"; 
img[7] = new Image();  img[7].src="../images/menu_4.jpg"; 
img[8] = new Image();  img[8].src="../images/menu_4over.jpg"; 
img[9] = new Image();  img[9].src="../images/menu_5.jpg"; 
img[10] = new Image();  img[10].src="../images/menu_5over.jpg"; 
img[11] = new Image();  img[11].src="../images/menu_6.jpg"; 
img[12] = new Image();  img[12].src="../images/menu_6over.jpg"; 
img[13] = new Image();  img[13].src="../images/menu_7.jpg"; 
img[14] = new Image();  img[14].src="../images/menu_7over.jpg"; 
img[15] = new Image();  img[15].src="../images/menu_8.jpg"; 
img[16] = new Image();  img[16].src="../images/menu_8over.jpg"; 
img[17] = new Image();  img[17].src="../images/header_toiawase.jpg"; 
img[18] = new Image();  img[18].src="../images/header_toiawase_over.jpg"; 




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