var goTop=document.querySelector('.aside'); var left=document.querySelector('.left') var right=document.querySelector('.right') var pageOne=document.querySelector('.firstPage') var pageSecond=document.querySelector('.nextPage') var videolist = document.querySelectorAll('.video'); var playControl=document.querySelectorAll('.play') var pageNo=1; var imgArr=['./images/01.png','./images/04.png','./images/02.png','./images/03.png']; console.log(pageOne) left.onclick=function(){ if(pageNo>1){ pageNo--; console.log(pageNo) left.src=imgArr[0] right.src=imgArr[1] pageOne.style.display='block' pageSecond.style.display='none' } } right.onclick=function(){ if(pageNo<2){ pageNo++; console.log(pageNo) left.src=imgArr[3] right.src=imgArr[2] pageOne.style.display='none' pageSecond.style.display='block' } } // 给play事件绑定暂停函数 ;[].forEach.call(videolist, function(i){ i.addEventListener('play', pauseAll.bind(i)) // console.log(isIE()) if(isIE()){ for (var a=0;a50){ goTop.classList.add('show') }else{ goTop.classList.remove('show') } } }