帝国cms下载判断设备环境安卓苹果并适配下载地址

$apk=$navinfor[apk];
$ipa=$navinfor[ipa];
if(!$apk){
    $apk='javascript:;';
    $apktext='暂不提供安卓版下载';
    $apkbackground="#999";
}else{
    $apktext='安卓版下载';
    $apkbackground="#65bb0a";
}
if(!$ipa){
    $ipa='javascript:;';
    $ipatext='暂不提供苹果版下载';
    $ipabackground="#999";
}else{
    $ipatext='苹果版下载';
    $ipabackground="#65bb0a";
}

<script type="text/javascript">
var u = navigator.userAgent;
var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端
var isiOS = !!u.match(/\\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
if(isAndroid){
    $(".downonclick").attr("href","<?=$apk?>");
    $(".downonclick").html("<?=$apktext?>");
    $(".downonclick").css("background","<?=$apkbackground?>");
}else if(isiOS){
    $(".downonclick").attr("href","<?=$ipa?>");
    $(".downonclick").html("<?=$ipatext?>");
    $(".downonclick").css("background","<?=$ipabackground?>");
}
</script>