-- 扩展Track的一些功能
function cc.BaseTrack:loadFromXmlNode(xmlNode)
	cc.Track.loadFromXmlNode(self , xmlNode);
	self:setBindSource(xmlNode.BindSource)
	self:setBindTarget(xmlNode.BindTarget)
	if xmlNode.SourceBone then
		self:setSourceBoneName(xmlNode.SourceBone)
	end
	
	if xmlNode.TargetBone then
		self:setTargetBoneName(xmlNode.TargetBone)
	end
end