javascript - Adding mouseover and mouseout on a tooltip in EXT JS -

i made info icon image near radio field , added tooltip in html html code tool tip is:-

<div id="info_icon-tooltip" class="tooltip"  style="max-width:auto; max-height:auto; border-color:#d80000;"> information part </div> 

pls me add mouseover , mouseout functions on info_icon in ext js..