How can i reload the page or a div using jquery and then cat

to clarify you know when your on twitter and you get an update telling you have 2 new tweets, i got the ajax referesh page bit sorted but how do i catch the new update and count them!! if i make sense...

Is it good to use JQuery UI themes in a big high traffic web

Is it a good way to use JQuery UI themes while implementing a high traffic website. Is it easy to edit and customize a little based on my website needs? Does it has any famous problems? want to hear your...