import mx.collections.ArrayCollection;
[Bindable]
public var myAC:ArrayCollection = new ArrayCollection([
{name:"A", username:"a",dtJoined:"01/02/2011"},
{name:"T", username:"t",dtJoined:"03/12/201"},
]);
public function formatDate(rowItem:Object,column:DataGridColumn):String
{
var retVal:String = "";
if(column.dataField == "dtJoined")
retVal = dFmt.format(rowItem.dtJoined);
else if(column.dataField == "dtLogin")
retVal = dFmt.format(rowItem.dtLogin);
return retVal;
}