스크립트 오류 질문

/* * jQuery Blueberry Slider v0.4 BETA * http://marktyrrell.com/labs/blueberry/ * * Copyright (C) 2011, Mark Tyrrell <me@marktyrrell.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program.  If not, see <http://www.gnu.org/licenses/>. * */ (function($){	$.fn.extend({		blueberry: function(options) { 			//default values for plugin options			var defaults = {				interval: 4000,				duration: 500,				lineheight: 1,				hoverpause: false,				pager: true,				nav: true, //reserved				keynav: true			}			var options =  $.extend(defaults, options); 			return this.each(function() {				var o = options;				var obj = $(this); 				//store the slide and pager li				var slides = $('.slidess li', obj);				var pager = $('.pager li', obj); 				//set initial current and next slide index values				var current = 0;				var next = current+1; 				//get height and width of initial slide image and calculate size ratio				var imgHeight = slides.eq(current).find('img').height();				var imgWidth = slides.eq(current).find('img').width();				var imgRatio = imgWidth/imgHeight; 				//define vars for setsize function				var sliderWidth = 995;				var cropHeight = 0; 				//hide all slides, fade in the first, add active class to first slide				slides.hide().eq(current).fadeIn(o.duration).addClass('active');				 				//build pager if it doesn't already exist and if enabled				if(pager.length) {					pager.eq(current).addClass('active');				} else if(o.pager){					obj.append('<ul class="pager"></ul>');					slides.each(function(index) {						$('.pager', obj).append('<li><a href="#"><span>'+index+'</span></a></li>')					});					pager = $('.pager li', obj);					pager.eq(current).addClass('active');				} 				//rotate to selected slide on pager click				if(pager){					$('a', pager).click(function() {						//stop the timer						clearTimeout(obj.play);						//set the slide index based on pager index						next = $(this).parent().index();						//rotate the slides						rotate();						return false;					});				} 				//primary function to change slides				var rotate = function(){					//fade out current slide and remove active class,					//fade in next slide and add active class					slides.eq(current).fadeOut(o.duration).removeClass('active')						.end().eq(next).fadeIn(o.duration).addClass('active').queue(function(){							//add rotateTimer function to end of animation queue							//this prevents animation buildup caused by requestAnimationFrame							//rotateTimer starts a timer for the next rotate							rotateTimer();							$(this).dequeue()					}); 					//update pager to reflect slide change					if(pager){						pager.eq(current).removeClass('active')							.end().eq(next).addClass('active');					} 					//update current and next vars to reflect slide change					//set next as first slide if current is the last					current = next;					next = current >= slides.length-1 ? 0 : current+1;				};				//create a timer to control slide rotation interval				var rotateTimer = function(){					obj.play = setTimeout(function(){						//trigger slide rotate function at end of timer						rotate();					}, o.interval);				};				//start the timer for the first time				rotateTimer(); 				//pause the slider on hover				//disabled by default due to bug				if(o.hoverpause){					slides.hover(function(){						//stop the timer in mousein						clearTimeout(obj.play);					}, function(){						//start the timer on mouseout						rotateTimer();					});				} 				//calculate and set height based on image width/height ratio and specified line height				var setsize = function(){					sliderWidth = $('.slidess', obj).width();					cropHeight = Math.floor(((sliderWidth/imgRatio)/o.lineheight))*o.lineheight; 					$('.slidess', obj).css({height: cropHeight});				};				setsize(); 				//bind setsize function to window resize event				$(window).resize(function(){					setsize();				});								 				//Add keyboard navigation 				if(o.keynav){					$(document).keyup(function(e){ 						switch (e.which) { 							case 39: case 32: //right arrow & space 								clearTimeout(obj.play); 								rotate(); 								break;  							case 37: // left arrow								clearTimeout(obj.play);								next = current - 1;								rotate(); 								break;						} 					});				}  			});		}	});})(jQuery);