function ai_wait_for_functions () {
var timeout = 5 * 1000;
var start = Date.now ();
return new Promise (wait_for_functions);
function wait_for_functions (resolve, reject) {
if (typeof ai_functions !== 'undefined')
resolve (ai_functions);
else if (timeout && (Date.now () - start) >= timeout)
reject (new Error ("AI FUNCTIONS NOT LOADED"));
else
setTimeout (wait_for_functions.bind (this, resolve, reject), 50);
}
}