I have enabled row hovering as follows:
<font style="color: rgb(0, 128, 0);" size="3"><span style="font-family: Luicida Console;">mygrid.enableRowsHover(true,
‘cssClassName’ );
This works initially and highlights the rows
as the user hovers over them, however as soon as the user clicks on a
row or highlights a block selection hovering over rows no longer
highlights the row.