var Device = {};

jQuery(document).ready(function() {
    if (!Device.isMobile()) {
        $('a.tel').each(function() {
            $(this).attr('href', $(this).attr('href').replace('tel:', 'callto:'));
        });
    }
});

Device.isMobile = function() {
    var mobileUserAgent = navigator.userAgent.toLowerCase();
    if (mobileUserAgent.search(/(iphone|ipod|opera mini|palm|blackberry|android|symbian|series60|acer|alcatel|audiovox|cdm|ericsson|lg\b|lge|motorola|mot|nec|nokia|panasonic|qci|sagem|samsung|sec|sanyo|sendo|sharp|sie-|sonyericsson|telit|telit_mobile_terminals|tsm)/) > -1) {
        return true;
    } else {
        return false;
    }
}