if(navigator.appVersion.charAt(0) >= 3) {
        var img = new Array();
        img[0] = new Image(); img[0].src = "images/common/main_menu01.gif";
        img[1] = new Image(); img[1].src = "images/common/main_menu02.gif";

        img[2] = new Image(); img[2].src = "images/common/main_menu03.gif";
        img[3] = new Image(); img[3].src = "images/common/main_menu04.gif";
		
		img[4] = new Image(); img[4].src = "images/common/main_menu05.gif";
        img[5] = new Image(); img[5].src = "images/common/main_menu06.gif";
		
		img[6] = new Image(); img[6].src = "images/common/main_menu07.gif";
        img[7] = new Image(); img[7].src = "images/common/main_menu08.gif";
		
		img[8] = new Image(); img[8].src = "images/common/main_menu09.gif";
        img[9] = new Image(); img[9].src = "images/common/main_menu10.gif";
		
		img[10] = new Image(); img[10].src = "images/common/main_menu11.gif";
        img[11] = new Image(); img[11].src = "images/common/main_menu12.gif";
		
		img[12] = new Image(); img[12].src = "images/top/top_btn01.gif";
        img[13] = new Image(); img[13].src = "images/top/top_btn03.gif";

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