How to preload a entire website like Gmail?

How to preload the entire website like gmail does? How to show this in progress bar? What are the mechanisms used to get this effect?

I ca开发者_开发百科n use jquery, jquery UI, php. Will this be enought to create this?

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I'm quite sure Gmail is built using the Google Web Toolkit, which essentially means that your whole application is contained in JavaScript files.. in fact the initial page source of Gmail is practically empty. This post will probably help: GMail like file upload progress bar with GWT?

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idea behind showing progress bar while page is loading....simply start loading bar and hide when $(document).ready(); All the others things after that are made with hashbang / hashtag. Here is exactly what you are looking for