code: function(node, tagNames){
  			var i = tagNames.length;
  			while(i--) {
  				if(node.tagName.toLowerCase() === tagNames[i]) {
  					return true;
  				}
  			}
  			return false;
  		}
docs: is a node one of a list of tags
  
  @param  {DOM Node} rootNode
  @param  {Array} tagNames
  @return {Boolean}