rv = elem->SetAttribute( NS_ConvertASCIItoUCS2(aName), aValue);
rv = elem->SetAttribute(aName, aValue);
SetChromeAttribute(nsIDocShell *aShell, const char *aID,                     const char *aName,  const nsString &aValue){  nsCOMPtr<nsIDOMElement> elem;  nsresult rv = GetChromeElement(aShell, aID, getter_AddRefs(elem));  if (NS_SUCCEEDED(rv) && elem)    // Set the text attribute.    rv = elem->SetAttribute( NS_ConvertASCIItoUCS2(aName), aValue);  return rv;}