<script>
var ua = navigator.userAgent.toLowerCase();
var url = "sms:0";
var is_os8 = (ua.indexOf("os 8") > -1) ? "&" : ";";
url += (ua.indexOf("iphone") > -1 || ua.indexOf("ipad") > -1) ? is_os8 : "?";
url += "body=" + encodeURIComponent("Hey check this out <xt:url />");
document.write('<div><a class="xt_button" href="'+url+'">Text this page to your friends</a></div>');
</script>Show in textarea