android selectの矢印が消える対策

CSS
.android{
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
background:url(../img/arrow_down.png) no-repeat;
background-size:20px;
background-position: right center;
padding:0 8px;
}

javascript
androidならclassを追加
$(function () {
var and_ua = navigator.userAgent;
if( and_ua.indexOf("Android") > 0 ) {
$("select").addClass("android");
}
});