if(navigator.appVersion.charAt(0) >=3){
        var btnimg = new Array();
    
         //使う画像の数だけループ
        for( i = 0 ; i < 9; i++ ){
                btnimg[i] = new Image();
        }
        //使う画像を登録しておく
        btnimg[0].src= "house/HOUSE_u.GIF";
        btnimg[1].src= "house/HOUSE_u_back.GIF";
        btnimg[2].src= "house/HOUSE_u_zz.GIF";
        btnimg[3].src= "house/HOUSE_u_walk.GIF";
        btnimg[4].src= "house/HOUSE_u_kash.GIF";
        btnimg[5].src= "house/HOUSE_u_sd.GIF";
        btnimg[6].src= "house/HOUSE_u_kapu.GIF";
        btnimg[7].src= "house/HOUSE_u_koron.GIF";
        btnimg[8].src= "house/HOUSE_u_ball.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;
    }
}