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create graphic diagram

Is there a way to read some values from a database and to generate a graphic diagram ?
I want to code a function, when a user goes over a link, the user gets information....like:
 
<- try a mouseover over the image 'smart people', you will see information and average (stars)...
 
 
Thank you very much!
 
Colin LoretzColin Loretz
You should be able to do this by using Visualforce and an existing ajax/javascript library.

You would be able to have all the data in a Salesforce Object. The visualforce page would initially show some of that data, with the rest of the data being displaying in the ajax tooltip.

Here is an example of how to implement the ballon/tooltip:
Demo: http://www.dhtmlgoodies.com/scripts/bubble-tooltip/bubble-tooltip.html
Info & Code: http://www.dhtmlgoodies.com/index.html?whichScript=bubble_tooltip