// initialize id sequencevarclipID=0;SVG.Clip=functionClip(){this.constructor.call(this,SVG.create('clipPath'));this.id='_'+(clipID++);this.attr('id',this.id);};// inherit from SVG.ElementSVG.Clip.prototype=newSVG.Element();// include the container objectSVG.extend(SVG.Clip,SVG.Container);