nsComputedDOMStyle::GetLeft(nsIFrame *aFrame, nsIDOMCSSPrimitiveValue*& aValue)
nsComputedDOMStyle::GetLeft(nsIFrame *aFrame, nsIDOMCSSValue** aValue)
nsComputedDOMStyle::GetLeft(nsIFrame *aFrame,                            nsIDOMCSSPrimitiveValue*& aValue){  return GetOffsetWidthFor(NS_SIDE_LEFT, aFrame, aValue);}