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

img[1] = new Image();  img[1].src="images/menu_top.gif"; 
img[2] = new Image();  img[2].src="images/menu_top_on.gif"; 
img[3] = new Image();  img[3].src="images/menu_news.gif"; 
img[4] = new Image();  img[4].src="images/menu_news_on.gif"; 
img[5] = new Image();  img[5].src="images/menu_concept.gif"; 
img[6] = new Image();  img[6].src="images/menu_concept_on.gif"; 
img[7] = new Image();  img[7].src="images/menu_floor.gif"; 
img[8] = new Image();  img[8].src="images/menu_floor_on.gif"; 
img[9] = new Image();  img[9].src="images/menu_wedding.gif"; 
img[10] = new Image();  img[10].src="images/menu_wedding_on.gif"; 
img[11] = new Image();  img[11].src="images/menu_company.gif"; 
img[12] = new Image();  img[12].src="images/menu_company_on.gif"; 
img[13] = new Image();  img[13].src="images/menu_contact.gif"; 
img[14] = new Image();  img[14].src="images/menu_contact_on.gif"; 

img[17] = new Image();  img[17].src="images/navi1.gif"; 
img[18] = new Image();  img[18].src="images/navi1_on.gif"; 
img[19] = new Image();  img[19].src="images/navi2.gif"; 
img[20] = new Image();  img[20].src="images/navi2_on.gif"; 
img[21] = new Image();  img[21].src="images/navi3.gif"; 
img[22] = new Image();  img[22].src="images/navi3_on.gif"; 
img[23] = new Image();  img[23].src="images/navi4.gif"; 
img[24] = new Image();  img[24].src="images/navi4_on.gif"; 
img[25] = new Image();  img[25].src="images/navi5.gif"; 
img[26] = new Image();  img[26].src="images/navi5_on.gif"; 
img[27] = new Image();  img[27].src="images/navi6.gif"; 
img[28] = new Image();  img[28].src="images/navi6_on.gif"; 
img[29] = new Image();  img[29].src="images/navi7.gif"; 
img[30] = new Image();  img[30].src="images/navi7_on.gif"; 



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