How to write a javascript for reloading a page in the same tab after every t seconds?

I am javascript newbie. I need to collect the packet traces for a webpage by reloading it in the sam开发者_如何学Pythone tab every 30 seconds. How can I do this using javascript?

You can either use a HTML only solution:

<meta http-equiv="refresh" content="30; URL=http://www.yourdomain.com/yoursite.html">

Or use Javascript:

setTimeout(function(){
   window.location.reload(1);
}, 30000);

Both ways refresh the current page every 30 seconds. Right from MDC:

Reload the document from the current URL. forceget is a boolean, which, when it is true, causes the page to always be reloaded from the server. If it is false or not specified, the browser may reload the page from its cache.