我尝试了许多代码来执行此操作，但是它不起作用。
图像代码在第21行中。这是代码的副本，我必须在其中添加下一个和上一个按钮：
<?php
defined ('_JEXEC') or die('Restricted access');
$par = JComponentHelper::getParams( 'com_djclassifieds' );
$app = JFactory::getApplication();
$item = $this->item;
$main_img_width = $par->get('gallery_width','200')-4;
$thumbs_limit = $par->get('gallery_thumbs_in_row','3');
$thumb_width = round(($par->get('gallery_width','200')/$thumbs_limit)-14);
$djMediaTools = ($par->get('djmediatools_integration', 0) == '1' && $par->get('djmediatools_album_item', 0) > 0) ? $par->get('djmediatools_album_item', 0) : false;
$djMediaToolsMinimum = (int)$par->get('djmediatools_minimum', 1);
JHtml::_('jquery.framework');
?>
<div class="images_wrap" style="width:<?php echo $par->get('gallery_width','200');?>px"><div class="images">
<?php if ($djMediaTools > 0 && count($this->item_images) >= $djMediaToolsMinimum) {?>
<div class="djc_images">
<?php echo JHtml::_('content.prepare', '{djmedia '.(int)$djMediaTools.'}', $par, 'com_djclassifieds.item.djmediatools'); ?>
</div>
<?php } else { ?>
<div class="djc_images">
<div class="djc_mainimage">
<?php if(count($this->item_images)){ ?>
<a id="djc_mainimagelink" rel="djc_lb_0" title="<?php echo $item->name; ?>" href="<?php echo JURI::base(true).$this->item_images[0]->thumb_b; ?>">
<img id="djc_mainimage" alt="<?php echo $item->name; ?>" src="<?php echo JURI::base(true).$this->item_images[0]->thumb_b;?>" />
</a>
<?php }else{?>
<?php if($par->get('blank_img_source','0')==1){ ?>
<img id="djc_mainimage" class="djc_mainimage_no_image" style="width:<?php echo $par->get('gallery_width','200');?>px" alt="<?php echo $item->name; ?>" src="<?php echo DJClassifiedsImage::getCatImage($item->cat_id);?>" />
<?php }else{ ?>
<img id="djc_mainimage" class="djc_mainimage_no_image" style="width:<?php echo $par->get('gallery_width','200');?>px" alt="<?php echo $item->name; ?>" src="<?php echo JURI::base(true).$par->get('blank_img_path','/components/com_djclassifieds/assets/images/').'no-image-big.png';?>" />
<?php } ?>
<?php }?>
</div>
<?php
if (count($this->item_images) > 1) { ?>
<div class="djc_thumbnails djc_thumbs_gal<?php echo $thumbs_limit;?> " id="djc_thumbnails">
<?php foreach($this->item_images as $im=>$img){
if($im>0 && $im%$thumbs_limit==0){
$new_row_class = ' new_row';
}else{
$new_row_class = '';
}
?>
<div class="djc_thumbnail djc_thumb_row<?php echo $new_row_class;?>">
<a rel="<?php echo JURI::base(true).$img->thumb_b;?>" title="<?php echo $img->caption; ?>" href="<?php echo JURI::base(true).$img->thumb_b;?>">
<img alt="<?php echo $img->caption; ?>" src="<?php echo JURI::base(true).$img->thumb_s;?>" />
</a>
</div>
<?php } ?>
<div class="clear_both"></div>
</div>
<?php } ?>
<?php for($ii=0; $ii<count($this->item_images);$ii++ ){ ?>
<a id="djc_lb_<?php echo $ii; ?>" class="lightbox-djitem" rel="lightbox-djitem" title="<?php echo $this->item_images[$ii]->caption;?>" href="<?php echo JURI::base(true).$this->item_images[$ii]->thumb_b;?>" style="display: none;"></a>
<?php } ?>
</div>
<?php } ?>
</div></div>
<script type="text/javascript">
this.DJCFImageSwitcher = function (){
var mainimagelink = document.id('djc_mainimagelink');
var mainimage = document.id('djc_mainimage');
var thumbs = document.id('djc_thumbnails') ? document.id('djc_thumbnails').getElements('img') : null;
var thumblinks = document.id('djc_thumbnails') ? document.id('djc_thumbnails').getElements('a') : null;
<?php if($par->get('lightbox_type','slimbox')!='magnific'){ ?>
if(mainimagelink && mainimage) {
mainimagelink.removeEvents('click').addEvent('click', function(evt) {
var rel = mainimagelink.rel;
document.id(rel).fireEvent('click', document.id(rel));
//if(!/android|iphone|ipod|series60|symbian|windows ce|blackberry/i.test(navigator.userAgent)) {
return false;
//}
//return true;
});
}
<?php } ?>
if (!mainimage || !mainimagelink || !thumblinks || !thumbs) return false;
thumblinks.each(function(thumblink,index){
var fx = new Fx.Tween(mainimage, {link: 'cancel', duration: 200});
thumblink.addEvent('click',function(event){
event.preventDefault();
//new Event(element).stop();
/*
mainimage.onload = function() {
fx.start('opacity',0,1);
};
*/
var img = new Image();
img.onload = function() {
fx.start('opacity',0,1);
};
fx.start('opacity',1,0).chain(function(){
mainimagelink.href = thumblink.href;
mainimagelink.title = thumblink.title;
mainimagelink.rel = 'djc_lb_'+index;
img.src = thumblink.rel;
mainimage.src = img.src;
mainimage.alt = thumblink.title;
});
return false;
});
});
};
window.addEvent('load', function(){
var img_width = document.id('dj-classifieds').getElement('.djc_images').getSize().x;
var dj_item = document.id('dj-classifieds').getElement('.djcf_images_generaldet_box').getSize().x;
var general_det = dj_item-img_width-1;
if(general_det<150){
document.id('dj-classifieds').getElement('.general_det').addClass('general_det_s');
}
if(general_det<301){
document.id('dj-classifieds').getElement('.general_det').addClass('general_det_m');
}
document.id('dj-classifieds').getElement('.general_det').setStyle('width',general_det) ;
});
window.addEvent('domready', function(){
DJCFImageSwitcher();
});
</script>
<?php if($par->get('lightbox_type','slimbox')=='magnific'){ ?>
<script type="text/javascript">
!function($){
$(document).ready(function(){
$('#djc_mainimagelink').click(function(e) {
e.preventDefault();
var rel = $(this).attr('rel');
console.log(rel);
$('#'+rel).click();
//console.log(e);
//do other stuff when a click happens
});
$('.lightbox-djitem').magnificPopup({
//$(this).magnificPopup({
// delegate: '.dj-slide-link', // the selector for gallery item
type: 'image',
mainClass: 'mfp-img-mobile',
gallery: {
enabled: true
},
image: {
verticalFit: true,
titleSrc: 'title'
},
iframe: {
patterns: {
youtube: null,
vimeo: null,
link: {
index: '/',
src: '%id%'
}
}
}
// });
});
});
}(jQuery);
</script>
<?php } ?>