AutoScroll for List

[Raji.S]

Hi friends,
I am developing a mobile project in flex4.6. I am using List Component in my project. i need to scroll the list at runtime using script. For Example, if i give index number=5, the list automatically has to scroll to the 5th index position.I used the below code, but it's working well sometimes only.

scrollToIndex(theList,5);
private function scrollToIndex(list:List,index:int):void {
                 if (!list.layout)         
                    return;      
                var dataGroup:DataGroup = list.dataGroup;      
                var spDelta:Point = dataGroup.layout.getScrollPositionDeltaToElement(index);
                
                if (spDelta)     
                {         
                    //dataGroup.horizontalScrollPosition += spDelta.x;         
                    //move it to the top if the list has enough items 
                       if(spDelta.y > 0)         
                    {   
                        var maxVSP:Number = dataGroup.contentHeight - dataGroup.height;             
                        var itemBounds:Rectangle = list.layout.getElementBounds(index);             
                        var newHeight:Number = dataGroup.verticalScrollPosition + spDelta.y + dataGroup.height - itemBounds.height;  
                        
                        dataGroup.verticalScrollPosition = Math.min(maxVSP, newHeight);   
                        
                    }         
                    else
                    {   
                        dataGroup.verticalScrollPosition += spDelta.y;
                                        } 
                }  
            }

Please help me.