Using this example that asgallant upload in other topic: 
http://jsfiddle.net/asgallant/5hN5V/5/

I would like to know if it could be possible to handle dinamically the 
tooltip when mouseover event is fired.

I've tryied to add a column to the dataTable like this:

*dataTable.addColumn({type: 'string', role: 'tooltip'});

*dataTable.addRows([
    ['2010', 600, *'this is new tooltip!'*],
.....
]);


but nothing happens and I've tryied also using annotation and 
annotationText, but nothing happens either:
            

*dataTable.addColumn({type: 'string', role: 'annotation'});
*

*dataTable.addColumn({type: 'string', role: 'annotationText', p: {html:true}});*


After reading google API documentation, I've seen that Timeline chart is 
not in the html tooltips supported charts list...

Any idea of how can I overwritte this tooltip? It could be done using 
jquery when the chart is ready?

Thank you.

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