FlushPendingReflows();
const nsStyleMargin* margin=nsnull; GetStyleData(eStyleStruct_Margin, (const nsStyleStruct*&)margin, aFrame);
nsComputedDOMStyle::GetMarginWidthFor(PRUint8 aSide, nsIFrame *aFrame,                                      nsIDOMCSSValue** aValue){  nsROCSSPrimitiveValue* val = GetROCSSPrimitiveValue();  NS_ENSURE_TRUE(val, NS_ERROR_OUT_OF_MEMORY);  FlushPendingReflows();  nscoord width = GetMarginWidthCoordFor(aSide, aFrame);  val->SetTwips(width);  return CallQueryInterface(val, aValue);}