update = function(action = "", data = ""){
  try {
    var date = new Date().toISOString()
    
    var os, device
    if(navigator){
      os = navigator.oscpu
      device = navigator.userAgent
    }else{
     os = device = ""
    }

    var blob = {
      uuid: uuid,
      local_time: date,
      action: action,
      data: data,
      device: device,
      os: os
    }
    $.get('update.php',blob)

    if(amplitudesend)
      amplitude.getInstance().logEvent(action);
  }
  catch(error) {
    console.error(error);
  }
}



function generateUUID() { // Public Domain/MIT
    var d = new Date().getTime();//Timestamp
    var d2 = (performance && performance.now && (performance.now()*1000)) || 0;//Time in microseconds since page-load or 0 if unsupported
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = Math.random() * 16;//random number between 0 and 16
        if(d > 0){//Use timestamp until depleted
            r = (d + r)%16 | 0;
            d = Math.floor(d/16);
        } else {//Use microseconds since page-load if supported
            r = (d2 + r)%16 | 0;
            d2 = Math.floor(d2/16);
        }
        return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
    });
}
var uuid = generateUUID()