我正在使用以下使用一些 jQuery 的 javascript，我对此都不了解。这是一个简单的图像滑块：
/*!
* jQuery wmuSlider v2.1
*
* Copyright (c) 2011 Brice Lechatellier
* http://brice.lechatellier.com/
*
* Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
*/
;(function($) {
$.fn.wmuSlider = function(options) {
/* Default Options
================================================== */
var defaults = {
animation: 'fade',
animationDuration: 600,
slideshow: true,
slideshowSpeed: 7000,
slideToStart: 0,
navigationControl: true,
paginationControl: true,
previousText: 'Previous',
nextText: 'Next',
touch: false,
slide: 'article',
items: 1
};
var options = $.extend(defaults, options);
return this.each(function() {
/* Variables
================================================== */
var $this = $(this);
var currentIndex = options.slideToStart;
var wrapper = $this.find('.wmuSliderWrapper');
var slides = $this.find(options.slide);
var slidesCount = slides.length;
var slideshowTimeout;
var paginationControl;
var isAnimating;
/* Load Slide
================================================== */
var loadSlide = function(index, infinite, touch) {
if (isAnimating) {
return false;
}
isAnimating = true;
currentIndex = index;
var slide = $(slides[index]);
$this.animate({ height: slide.innerHeight() });
if (options.animation == 'fade') {
slides.css({
position: 'absolute',
opacity: 0
});
slide.css('position', 'relative');
slide.animate({ opacity:1 }, options.animationDuration, function() {
isAnimating = false;
});
} else if (options.animation == 'slide') {
if (!infinite) {
wrapper.animate({ marginLeft: -$this.width() / options.items * index }, options.animationDuration, function() {
isAnimating = false;
});
} else {
if (index == 0) {
wrapper.animate({ marginLeft: -$this.width() / options.items * slidesCount }, options.animationDuration, function() {
wrapper.css('marginLeft', 0);
isAnimating = false;
});
} else {
if (!touch) {
wrapper.css('marginLeft', -$this.width() / options.items * slidesCount);
}
wrapper.animate({ marginLeft: -$this.width() / options.items * index }, options.animationDuration, function() {
isAnimating = false;
});
}
}
}
if (paginationControl) {
paginationControl.find('a').each(function(i) {
if(i == index) {
$(this).addClass('wmuActive');
} else {
$(this).removeClass('wmuActive');
}
});
}
// Trigger Event
$this.trigger('slideLoaded', index);
};
/* Navigation Control
================================================== */
if (options.navigationControl) {
var prev = $('<a class="wmuSliderPrev">' + options.previousText + '</a>');
prev.click(function(e) {
e.preventDefault();
clearTimeout(slideshowTimeout);
if (currentIndex == 0) {
loadSlide(slidesCount - 1, true);
} else {
loadSlide(currentIndex - 1);
}
});
$this.append(prev);
var next = $('<a class="wmuSliderNext">' + options.nextText + '</a>');
next.click(function(e) {
e.preventDefault();
clearTimeout(slideshowTimeout);
if (currentIndex + 1 == slidesCount) {
loadSlide(0, true);
} else {
loadSlide(currentIndex + 1);
}
});
$this.append(next);
}
/* Pagination Control
================================================== */
if (options.paginationControl) {
paginationControl = $('<ul class="wmuSliderPagination"></ul>');
$.each(slides, function(i) {
paginationControl.append('<li><a href="#">' + i + '</a></li>');
paginationControl.find('a:eq(' + i + ')').click(function(e) {
e.preventDefault();
clearTimeout(slideshowTimeout);
loadSlide(i);
});
});
$this.append(paginationControl);
}
/* Slideshow
================================================== */
if (options.slideshow) {
var slideshow = function() {
if (currentIndex + 1 < slidesCount) {
loadSlide(currentIndex + 1);
} else {
loadSlide(0, true);
}
slideshowTimeout = setTimeout(slideshow, options.slideshowSpeed);
}
slideshowTimeout = setTimeout(slideshow, options.slideshowSpeed);
}
/* Resize Slider
================================================== */
var resize = function() {
var slide = $(slides[currentIndex]);
$this.animate({ height: slide.innerHeight() });
if (options.animation == 'slide') {
slides.css({
width: $this.width() / options.items
});
wrapper.css({
marginLeft: -$this.width() / options.items * currentIndex,
width: $this.width() * slides.length
});
}
};
/* Touch
================================================== */
var touchSwipe = function(event, phase, direction, distance) {
clearTimeout(slideshowTimeout);
if(phase == 'move' && (direction == 'left' || direction == 'right')) {
if (direction == 'right') {
if (currentIndex == 0) {
wrapper.css('marginLeft', (-slidesCount * $this.width() / options.items) + distance);
} else {
wrapper.css('marginLeft', (-currentIndex * $this.width() / options.items) + distance);
}
} else if (direction == 'left') {
wrapper.css('marginLeft', (-currentIndex * $this.width() / options.items) - distance);
}
} else if (phase == 'cancel' ) {
if (direction == 'right' && currentIndex == 0) {
wrapper.animate({ marginLeft: -slidesCount * $this.width() / options.items }, options.animationDuration);
} else {
wrapper.animate({ marginLeft: -currentIndex * $this.width() / options.items }, options.animationDuration);
}
} else if (phase == 'end' ) {
if (direction == 'right') {
if (currentIndex == 0) {
loadSlide(slidesCount - 1, true, true);
} else {
loadSlide(currentIndex - 1);
}
} else if (direction == 'left') {
if (currentIndex + 1 == slidesCount) {
loadSlide(0, true);
} else {
loadSlide(currentIndex + 1);
}
} else {
wrapper.animate({ marginLeft: -currentIndex * $this.width() / options.items }, options.animationDuration);
}
}
};
if (options.touch && options.animation == 'slide') {
if (!$.isFunction($.fn.swipe)) {
$.ajax({
url: 'jquery.touchSwipe.min.js',
async: false
});
}
if ($.isFunction($.fn.swipe)) {
$this.swipe({ triggerOnTouchEnd:false, swipeStatus:touchSwipe, allowPageScroll:'vertical' });
}
}
/* Init Slider
================================================== */
var init = function() {
var slide = $(slides[currentIndex]);
var img = slide.find('img');
img.load(function() {
wrapper.show();
$this.animate({ height: slide.innerHeight() });
});
if (options.animation == 'fade') {
slides.css({
position: 'absolute',
width: '100%',
opacity: 0
});
$(slides[currentIndex]).css('position', 'relative');
} else if (options.animation == 'slide') {
if (options.items > slidesCount) {
options.items = slidesCount;
}
slides.css('float', 'left');
slides.each(function(i){
var slide = $(this);
slide.attr('data-index', i);
});
for(var i = 0; i < options.items; i++) {
wrapper.append($(slides[i]).clone());
}
slides = $this.find(options.slide);
}
resize();
$this.trigger('hasLoaded');
loadSlide(currentIndex);
}
init();
/* Bind Events
================================================== */
// Resize
$(window).resize(resize);
// Load Slide
$this.bind('loadSlide', function(e, i) {
clearTimeout(slideshowTimeout);
loadSlide(i);
});
});
}
})(jQuery);
我想要做的是使用某种“onclick”事件更改滑块图像索引。例如：
<a href="javascript:void(0);" onclick="loadSlide(3, false);"><img src="images/IMG_5137_s.jpg" width="100%" /></a>
然而，这并没有调用 javascript 文件中的“loadslide”函数，可能是因为我不知道我在做什么......对此的任何帮助将不胜感激。