what this code ?
/**
DRIVER APP
Version 1.8.0
*/

var ajax_url= krms_driver_config.ApiUrl ;
var dialog_title_default= krms_driver_config.DialogDefaultTitle;
var search_address;
var ajax_request = [];
var networkState;
var reload_home;
var translator;

var ajax_request2;
var ajax_request3;
var map;
var watchID;
var app_running_status='active';
var push;

var device_platform;
var app_version = "1.8.0";
var map_bounds;
var map_marker;
var map_style = [ {stylers: [ { "saturation":-100 }, { "lightness": 0 }, { "gamma": 1 } ]}];
var exit_cout = 0;
var device_id   = 'device_01231';

var $handle_location = [];
var $cron_interval =  10*1000;
var ajax_task;
var ajax_timeout = 50000;
var ajax_new_task;
var timer = {};
var map_navigator = 0;
var bgGeo;

jQuery.fn.exists = function(){return this.length&gt;0;}

function dump(data)
{
	console.debug(data);
}

dump2 = function(data) {
	alert(JSON.stringify(data));	
};

function setStorage(key,value)
{
	localStorage.setItem(key,value);
}

function getStorage(key)
{
	return localStorage.getItem(key);
}

function removeStorage(key)
{
	localStorage.removeItem(key);
}

function explode(sep,string)
{
	var res=string.split(sep);
	return res;
}

function urlencode(data)
{
	return encodeURIComponent(data);
}

empty = function(data) {
	if (typeof data === "undefined" || data==null || data=="" || data=="null" || data=="undefined" ) {	
		return true;
	}
	return false;
}

function isDebug()
{
	var debug = krms_driver_config.debug;
	if(debug){
		return true;
	}
	return false;
}

function hasConnection()
{	
	return true;
}

$( document ).on( "keyup", ".numeric_only", function() {
  this.value = this.value.replace(/[^0-9\.]/g,'');
});	 

/*START DEVICE READY*/
document.addEventListener("deviceready", function() {
	
	try {
		
	   navigator.splashscreen.hide();
	
	   device_platform = device.platform;
	   
	   document.addEventListener("offline", noNetConnection, false);
	   document.addEventListener("online", hasNetConnection, false);
	   
	   document.addEventListener("pause", onBackgroundMode, false);
       document.addEventListener("resume", onForegroundMode, false);
	   
	   initFirebasex();
	   	   	   	   	   	   	   
    } catch(err) {
      alert(err.message);
    } 
    	
 }, false);
/*END DEVICE READY*/

// set device
ons.platform.select('android');
//ons.platform.select('ios');

/*onsen ready*/
ons.ready(function() {
		
	if (ons.platform.isIPhoneX()) {		
	    document.documentElement.setAttribute('onsflag-iphonex-portrait', '');
	    $('head').append(''); 	     
	}
	
	if (isDebug()){		
		setStorage("device_id","device_1233456789");
		device_platform = "Android";
	}
	
	setStorage('camera_on', 2 );
	
	ons.setDefaultDeviceBackButtonListener(function(event) {				
		exit_cout++;
		if(exit_cout&lt;=1){		
			toastMsg( getTrans("Press once again to exit!","exit") );	
			 setTimeout(function(){ 
			 	 exit_cout=0;
			 }, 3000);
		} else {
			if (navigator.app) {
			   navigator.app.exitApp();
			} else if (navigator.device) {
			   navigator.device.exitApp();
			} else {
			   window.close();
			}
		}
	});
		
}); /*end ready*/

