var u = navigator.userAgent,
ua = navigator.userAgent.toLowerCase(),
isLineApp = u.indexOf("Line") > -1, // Line 內建瀏覽器
isFbApp = u.indexOf("FBAV") > -1, // FB App 內建瀏覽器
isWeixinApp = ua.match(/MicroMessenger/i) == "micromessenger"; // 微信內建瀏覽器
if (isLineApp) {
    webShareImp();
}
if (isFbApp) {
    webShareImp();
}
if (isWeixinApp) {
    webShareImp();
}