There is a way to do this will just css.. but i will skip that for a clearer solution
You can do this with javascript : you need to attach a function to the mouse over/out events of the html tag. here is one way
<img src="img.jpg"
onMouseOver="javascript:turnOnTable()"
onMouseOut="javascript:turnOffTable()" />
now you will need to write javascript functio which will show your table
function turnOnTable()
{
var table = document.getElementById('tableID')
table.style.display = '' /// blank is default which mean on
}
function turnOffTable()
{
var table = document.getElementById('tableID')
table.style.display = 'none' /// none means off
}