Is there a way I can show variable name when i hover over a img?

I have a working code below:

<cfoutput query="Mush2">
  <tr>
td nowrap="nowrap">#DATEFORMAT(commentdate, "mm/dd/yyyy")#</td>
......some code here
  <td nowrap="nowrap"><CFIF len(APPROVEDDATE)><img src="icon_checkmark.png" onmouseover="" onmouseout=""></cfif></td>

  </tr>
  </cfoutput>

Is it possible that when I hover over the image icon_checkmark i will be able to output the #dateapproved# in the mush2 query ?

Or do i have to end up using javascript or something else to make it happen?