How to change bgcolor while hovering mouse on cell ??

Answer 1

you can use CSS to add a hover style:

<table>
<tr>
<td>No Hover</td>
<td class="t1">Hover</td>
<td>No Hover</td>
</tr>
</table>

and add this CSS

td .t1:hover {
background-color: blue;
}

hope this helps!
just comment back if you have other questions, and I'll answer them :)

Answer 2

With onmouseover event attribute.