così:
codice:
onmouseover="setTableColor(this, '#FFEEAA')"
e
codice:
function setTableColor(mytable, col)
{
		for (var c = 0; c < mytable.rows.length; c++) {
	    	for (var td = 0; td < mytable.rows[c].cells.length; td++) {
						mytable.rows[c].cells[td].bgColor = col;
						mytable.rows[c].cells[td].borderColor = col;
		    }
    }
    return true;
}