var url = "http://m.koalajo.com/index.html" // Get the user agent string var deviceAgent = navigator.userAgent; // Set var to iOS device name or null var ios = deviceAgent.toLowerCase().match(/(iphone|ipod|ipad)/); $('#btn-fb-share').click(function() { if (ios) { // This is the line that matters $(this).attr('href', url); } else { // Your code that works for desktop browsers $('#btn-fb-share').attr("disabled", "disabled"); window.open(url,2789432749274249,"location=yes,menubar=yes"); } });