Bug 313882 [Regression]pageoverflow plus pagebreakinternal shows different pdf pages in web viewer and preview
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/nLayout/area/impl/ContainerArea.java
{
			height = aHeight - localProperties.getMarginBottom( )
					- localProperties.getMarginTop( );
		}
		else
		{
			height = aHeight;
		}
	}
	public int getContentHeight( int allocatedHeight )
	{
		if ( hasStyle )
		{
			return allocatedHeight - localProperties.getPaddingBottom( )
					- localProperties.getPaddingTop( )
					- localProperties.getMarginTop( )
					- localProperties.getMarginBottom( )
					- boxStyle.getBottomBorderWidth( )
					- boxStyle.getTopBorderWidth( );
		}
		else
		{
			return allocatedHeight;
		}
	}
	public int getContentY( )
	{
		if ( hasStyle )
		{
			return localProperties.getPaddingTop( )