btn-test

<div style="margin:20px; text-align: center;">
    <button onClick="orderNow()" class="row" style=" width:100%; background-color: limegreen; border-radius: 50px; border: none; color: white; font-size: 20pt; padding: 10px 30px 10px;  text-decoration: none; box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);">
    
        <div class="col-sm-3" style="text-align: center;">
            <img border="0" src="https://4.bp.blogspot.com/-q6DGmmJeiVA/XltEvxCmV2I/AAAAAAAACGo/lYbHpdWIBsgeivj0TiiFiY_VYo6WH6rBwCNcBGAsYHQ/s1600/image%2B%252817%2529.webp" data-original-width="50" data-original-height="50" />
        </div>
    
        <div class="col-sm-9" style="text-align: left;">
            <b style="font-size: 24pt;">ORDER NOW</b> <br/> <b>Click to WhatsApp<br/>
        </div>

    </button>
</div>



<script>
function orderNow(){
  fbq('track', 'AddPaymentInfo');

  var ua = navigator.userAgent.toLowerCase();
console.log(ua);
console.log("DAN");
console.log(ua.indexOf("mobile"));
  var isMobile = ua.indexOf("mobile") > -1;
  if (isMobile) {
      window.location.href = "whatsapp://send?text=Hai%20kak,%20saya%20mau%20pesan%20USB%20Mosquito%20Trap%20ya&phone=6281353296457";
      fbq('track', 'Purchase', {
        value: 145000,
        currency: 'IDR',
      });
  } else {
      window.open("https://web.whatsapp.com/send?text=Hai%20kak,%20saya%20mau%20pesan%20USB%20Mosquito%20Trap%20ya&phone=6281353296457", "Share with Whatsapp Web", 'width=800,height=600');
      fbq('track', 'Purchase', {
        value: 145000,
        currency: 'IDR',
      });
  }
}
</script>