How to open preview page within html page?

[Sridhar_Rao]

Those of us who have used google desktop search would have noticed that the desktop search throws up a list with links to those documents. There is also a [+] preview button below the link, clicking on which opens a window within the page and [-] hide preview button to revert it.
Does anyone here has the javascript code for accomplishing the same?

[slugger]

u mean the show/hide method