if(navigator.appVersion.charAt(0) >= 3) {
        var img = new Array();
        img[0] = new Image(); img[0].src = "images/index/btn_ent01.jpg";
        img[1] = new Image(); img[1].src = "images/index/btn_ent02.jpg";

        img[2] = new Image(); img[2].src = "images/common/btn_home01.jpg";
        img[3] = new Image(); img[3].src = "images/common/btn_home02.jpg";
		
		img[4] = new Image(); img[4].src = "images/common/btn_about01.jpg";
        img[5] = new Image(); img[5].src = "images/common/btn_about02.jpg";
		
		img[6] = new Image(); img[6].src = "images/common/btn_this01.jpg";
        img[7] = new Image(); img[7].src = "images/common/btn_this02.jpg";
		
		img[8] = new Image(); img[8].src = "images/common/btn_ctb01.jpg";
        img[9] = new Image(); img[9].src = "images/common/btn_ctb02.jpg";
		
		img[10] = new Image(); img[10].src = "images/common/btn_dp01.jpg";
        img[11] = new Image(); img[11].src = "images/common/btn_dp02.jpg";
		
		img[12] = new Image(); img[12].src = "images/common/btn_wn01.jpg";
        img[13] = new Image(); img[13].src = "images/common/btn_wn02.jpg";
		
		img[14] = new Image(); img[14].src = "images/common/btn_form01.jpg";
        img[15] = new Image(); img[15].src = "images/common/btn_form02.jpg";
		
		img[16] = new Image(); img[16].src = "images/common/btn_mem01.jpg";
        img[17] = new Image(); img[17].src = "images/common/btn_mem02.jpg";
		
		img[18] = new Image(); img[18].src = "images/common/btn_ag01.jpg";
        img[19] = new Image(); img[19].src = "images/common/btn_ag02.jpg";
		
		img[20] = new Image(); img[20].src = "images/common/btn_masm01.jpg";
        img[21] = new Image(); img[21].src = "images/common/btn_masm02.jpg";
		
		img[22] = new Image(); img[22].src = "images/common/btn_hoii01.jpg";
        img[23] = new Image(); img[23].src = "images/common/btn_hoii02.jpg";
		
		img[24] = new Image(); img[24].src = "images/common/btn_atm01.jpg";
        img[25] = new Image(); img[25].src = "images/common/btn_atm02.jpg";
}
function change_image(nam,num) {
        if(navigator.appVersion.charAt(0) >= 3) {
                document.images[nam].src = img[num].src;
        }
}

function exMenu(tName) { tMenu = document.all[tName].style; if (tMenu.display == 'none') tMenu.display = "block"; else tMenu.display = "none"; }