Pop up information box

i have created a script, so in setting area i need to show [?] in front of every setting field and when user move cursor over [?] i want them to see a small popup displaying information and when they move cursor out it closes ...


i need some way in which i don't need keep huge text in files ...

simple way like <span id=###>Here Goes The Text</span>

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<span ONMOUSEOVER="popup('Link description here','yellow')"; ONMOUSEOUT="kill()">[?]</span>

working this way .... any way to convert "~~ONMOUSEOVER="popup('Link description here','yellow')"; ONMOUSEOUT="kill()"~~" party in few alphabets ?

They are called tooltips See this page or just google it:
http://www.kollermedia.at/archive/2008/03/24/easy-css-tooltip/

If you get good try fancy ones:http://sixrevisions.com/css/css-only-tooltips/