Bug 312531 Highlight works differently when run SvgInteractivityViewer.java [13]
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGGraphics2D.java
element.setAttribute( "clip-path", "url(#clip" + clip.hashCode( ) + ")" ); 
	}
	protected void setFillColor( Element currentElement )
	{
		setFillColor( currentElement, false );
	}
	/**
	 * Adds no fill color and style information to the element passed in.
	 * 
	 * @param currentElement
	 *            the element to add style information to.
	 */
	protected void setNoFillColor( Element currentElement )
	{
		
		String style = currentElement.getAttribute( "style" ); 
		if ( style == null )
			style = ""; 
		currentElement.setAttribute( "style", style + "fill:none;" ); 			
	}
	/**
	 * Adds fill color and style information to the element passed in.
	 * 
	 * @param currentElement
	 *            the element to add style information to.
	 * @param isClipped
	 *            boolean that determines whether to defer the clipping of the
	 *            element
	 */
	protected void setFillColor( Element currentElement, boolean deferClipped )