I came across a site last week and but I forgot what's the site url. It has a few tabs on top, each with links which looks like: <a href="#tab1">Tab 1</a> <a href="#tab2">Tab 2</a> <a href="#tab3">Tab 3</a> When I click at Tab 2, it shows tab 2 and hides tab 1 and tab 3. So I think it has something related to the # thing. Maybe a function that monitor the changes of #?? I am 100% sure that the link do not have onclick="function" on them Something like Gmail.. Gmail inbox is : url#inbox Gmail spam is : url#spam How can i do that? Thank you.