<table border="1" width="40%">
<tr onmouseover="changeColor(this)" onmouseout="this.bgColor='white'"><td >Line 1</td></tr>
<tr onmouseover="changeColor(this)" onmouseout="this.bgColor='white'"><td>Line 2</td></tr>
<tr onmouseover="changeColor(this)" onmouseout="this.bgColor='white'"><td>Line 3</td></tr>
</table>