為什么點擊按鈕不會切換圖片？
var imgs=[
??'http://i2.hoopchina.com.cn/user/308/15960308/13383588090.jpg',
??'http://img.article.pchome.net/00/44/23/20/pic_lib/wm/2.jpg',
??'http://lcd.yesky.com/imagelist/2009/044/404q4y8g4m0p.jpg',
??'http://lcd.yesky.com/imagelist/2009/044/cgro54wt2t2x.jpg'
?];
var index=0;
var lens=imgs.length;
$('.btn').on('click',function () {
?if ('prev'===$(this).data('control')) {
?? index=Math.max(0,--index);
?}
??? else {
??? ?index=Math.min(lens-1,++index);
??? }
??? document.title=(index+1)+"/"+lens;
??? $("#picbox").attr('src',imgs[index]);
});
2017-05-30
data-control（請問這個是什么意思）
2017-05-30
還是不行呀，我用了你的代碼，沒反應的
2017-05-18
我把你的稍微改了一下：
<!DOCTYPE?html> <html> <head> ????<meta?charset="UTF-8"> ????<title>Document</title> </head> <body> ????<div> ????????<img?id="picbox"?src="http://i2.hoopchina.com.cn/user/308/15960308/13383588090.jpg"?alt="pic"?width="1200"/> ????????<p> ????????????<a?href="javascript:;"?data-control="prev">上一張</a> ????????????<a?href="javascript:;"?data-control="next">下一張</a> ????????</p> ????</div> ????<script?src="js/jquery.min.js"></script> ????<script> ????????$(function?()?{ ????????????var?imgs=[ ????????????????'http://i2.hoopchina.com.cn/user/308/15960308/13383588090.jpg', ????????????????'http://img.article.pchome.net/00/44/23/20/pic_lib/wm/2.jpg', ????????????????'http://lcd.yesky.com/imagelist/2009/044/404q4y8g4m0p.jpg', ????????????????'http://lcd.yesky.com/imagelist/2009/044/cgro54wt2t2x.jpg' ????????????]; ????????????var?index=0; ????????????var?lens=imgs.length; ????????????$('.btn').on('click',function?()?{ ????????????????if?('prev'===$(this).data('control'))?{ ????????????????????index=Math.max(0,--index); ????????????????}?else?{ ????????????????????index=Math.min(lens-1,++index); ????????????????} ????????????????document.title=(index+1)+"/"+lens; ????????????????$("#picbox").attr('src',imgs[index]); ????????????}); ????????}); ????</script> </body> </html>我補全了一下，可以動，你對比下
2017-05-18
貼出來的沒啥問題，最好貼下所有代碼。懷疑picbox不是img的ID