MouseOver event

row.setEvent("onmouseover", "mouseover(this, 'active-row-highlight')");
row.setEvent("onmouseout", "mouseout(this, 'active-row-highlight')");
obj.onRowMouseOver = function(event, rowIndex){
alert('this is test');
alert(this.getRowPosition(rowIndex));
};


I am unable to get the alert using onRowMouseOver, is there any alternative ?