//前もって全画像をダウンロードしておく
if(navigator.appVersion.charAt(0) >=3){
	var btnimg = new Array();

	//使う画像の数だけループする
	for( i = 0 ; i < 46  ; i++ ){
		btnimg[i] = new Image();
	}
	//使う画像を登録しておく
	btnimg[0].src= "images/gyoumu1_off.gif";
	btnimg[1].src= "images/gyoumu1_on.gif";
	btnimg[2].src= "images/gyoumu2_off.gif";
	btnimg[3].src= "images/gyoumu2_on.gif";
	btnimg[4].src= "images/gyoumu3_off.gif";
	btnimg[5].src= "images/gyoumu3_on.gif";
	btnimg[6].src= "images/gyoumu4_off.gif";
	btnimg[7].src= "images/gyoumu4_on.gif";
	btnimg[8].src= "images/gyoumu5_off.gif";
	btnimg[9].src= "images/gyoumu5_on.gif";
	btnimg[10].src= "images/gyoumu6_off.gif";
	btnimg[11].src= "images/gyoumu6_on.gif";
	btnimg[12].src= "images/gyoumu7_off.gif";
	btnimg[13].src= "images/gyoumu7_on.gif";
	btnimg[14].src= "images/gyoumu8_off.gif";
	btnimg[15].src= "images/gyoumu8_on.gif";
	btnimg[16].src= "images/gyoumu9_off.gif";
	btnimg[17].src= "images/gyoumu9_on.gif";
	btnimg[18].src= "images/shozai_map_off.gif";
	btnimg[19].src= "images/shozai_map_on.gif";
	btnimg[20].src= "images/index_bar_off.gif";
	btnimg[21].src= "images/index_bar_on.gif";
	btnimg[22].src= "images/index_sbar1_off.gif";
	btnimg[23].src= "images/index_sbar1_on.gif";
	btnimg[24].src= "images/index_sbar2_off.gif";
	btnimg[25].src= "images/index_sbar2_on.gif";
	btnimg[26].src= "images/index_sbar3_off.gif";
	btnimg[27].src= "images/index_sbar3_on.gif";
	btnimg[28].src= "images/index_sbar4_off.gif";
	btnimg[29].src= "images/index_sbar4_on.gif";
	btnimg[30].src= "images/index_sbar5_off.gif";
	btnimg[31].src= "images/index_sbar5_on.gif";
	btnimg[32].src= "images/index_sbar6_off.gif";
	btnimg[33].src= "images/index_sbar6_on.gif";
	btnimg[34].src= "images/index_sbar7_off.gif";
	btnimg[35].src= "images/index_sbar7_on.gif";
	btnimg[36].src= "images/index_sbar8_off.gif";
	btnimg[37].src= "images/index_sbar8_on.gif";
	btnimg[38].src= "images/index_sbar9_off.gif";
	btnimg[39].src= "images/index_sbar9_on.gif";
	btnimg[40].src= "images/index_bar_infor_off.gif";
	btnimg[41].src= "images/index_bar_infor_on.gif";
	btnimg[42].src= "images/index_bar_gaiyou_off.gif";
	btnimg[43].src= "images/index_bar_gaiyou_on.gif";
	btnimg[44].src= "images/index_bar_saiyou_off.gif";
	btnimg[45].src= "images/index_bar_saiyou_on.gif";

}

//画像を書き換える関数
function paintBtn(dim,cnt){
    if(navigator.appVersion.charAt(0) >= 3 ){
        document.images[dim].src=btnimg[cnt].src;
    }
}