Javascript Session Data Storage

Question

Does anyone know of a reliable way to store data to use across pages of a site?... Here is what I've found so far:

1. Cookies - Not enough capacity to store what I need atm.
2. URL hash - Same as above
3. Frames - Not a method I would use atm.
4. HTML 5 document.localStorage and document.sessionStorage - Not fully supported yet
5. Google Gears - The users of the site will most likely not have this installed
6. YUI Storage - This sounds promising... does anyone have experience using it?
7. jStore - This also sounds promising, but when I tried using the demo and reloaded the page, it lost my input. Does anyone have experience with this plugin?

Note: I am not an admin of the site in question, so I don't have database privileges, but I am able to add scripting.

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Edit: I found this interesting site that saves session variables in the window.name... it probably has some security issues as well

Answer 1

Dojo has a cool plugin that uses flash for a local storage. Plus it abstracts it so if they have gears or an html5 browser it will use that instead

Answer 2

<input type="hidden"

store the value in it, the info comes back from the page together with the info, and after you send it to another page, and so on

Answer 3

Can you use server-sides sessions?