Keep caching off in AJAX script [1/2]

AJAX is modern new technology which gives you an advanced way to improve the quality, speed and interactivity of internet applications. But the applications which intensively using AJAX, have one problem. To request data they make a URL post to server side script. This URL is cached by the client browser and even the server will serve new data, old data will be received by the browser.

To solve this problem we will use some small fix. We have to add something unique to the URL, which will be with different value each time when the request will be sended. To do this we will use some value from current time.

To get the current time we will create an variable named date and will assign Date() object to this variable. Next using getTime() property on date variable will get the current time in new variable named timestamp.