效果展現以下:javascript
setInterval(moverleft,3000);定時器設置爲3秒,並且實現圖片下方的小圓點序號跟圖片對應,點擊小圓點也能切換圖片。css
代碼以下:html
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>輪播的div+css樣式改進</title> <style type="text/css"> body{background-image: url(img/001.jpg);} .lb{ margin: 10px auto; width: 1440px; height: 420px; } #you{ cursor: pointer; display: inline-block; height: 420px; width: 45px; left: 1395px; top: -424px; position: relative; z-index: 1; } #zuo{ cursor: pointer; height: 420px; width: 45px; top: 424px; position: relative; z-index: 1; } .f{ opacity:0.2;//設置透明 } .f:hover { opacity:1.0;//設置鼠標通過不透明 } li{ list-style-type: square; border: 1px #000; width: 100px; height: 100px; } .ul{ margin: auto; display: inline-block; position: relative; /*相對定位*/ z-index: 2; left: 830px; top: 380px; } #buttons span { cursor: pointer; font-size: 15px; text-align: center; font-family: "微軟雅黑"; float: left; border: 1px solid #fff; width: 20px; height: 20px; border-radius: 50%; /*設置爲圓形*/ /*background: #333; */ margin-right: 15px; /*設置圓形的間隔爲15像素*/ } #buttons .on { background: orangered; /*選中的按鈕樣式*/ } </style> </head> <body> <div class="lb"> <img src="img/左.png" id="zuo" class="f" /> <img src="img/1.jpg" id="img" /> <img src="img/右.png" id="you" class="f"/> </div> <div class="ul" id="buttons"><span index="1" class="on.45454" style="background: #FF4500;">1</span><span index="2" >2</span><span index="3">3</span><span index="4">4</span><span index="5">5</span><span index="6">6</span><span index="7">7</span></div> <script type="text/javascript"> var zuo=document.getElementById("zuo"); var you=document.getElementById("you"); var img=document.getElementById("img"); var lb=document.getElementsByClassName("lb")[0]; var index=1; var moverleft=function () { index++; if(index>7)index=1; img.src="img/"+index+".jpg"; changbg (); } you.onclick=moverleft; var moverright=function () { index--; if(index<1)index=7; img.src="img/"+index+".jpg"; changbg (); } zuo.onclick=moverright; var mm=setInterval(moverleft,3000); lb.onmousemove=function () { clearInterval(mm); } lb.onmouseout=function () { mm=setInterval(moverleft,3000); } /* var buttons = document.getElementById("buttons").getElementsByTagName("span"); function showButton() { //先找出原來有.on類的按鈕,並移除其類 for (var i = 0; i < buttons.length ; i++) { if( buttons[i].className == 'on'){ buttons[i].className = ''; break; } } //爲當前按鈕添加類,索引下標從0開始,故需減1 buttons[index - 1].className = 'on'; } for (var i = 0; i < buttons.length; i++) { buttons[i].onclick = function () { if (moverleft()) { //若是切換還在進行,則直接結束,直到切換完成 return; } if(this.className == 'on') { //若是點擊的按鈕是當前的按鈕,不切換,結束 return; } } } */ var buttons = document.getElementById("buttons").childNodes; function changbg () { for(var i=0;i<buttons.length;i++) { buttons[i].style.background="#333333"; } buttons[index-1].style.background="#FF4500"; } //把下面小數字圖標和圖片鏈接起來,利用閉包的特色 for(var i=0;i<buttons.length;i++){ buttons[i].onclick=(function () { var j=i+1; return function () { index=j; img.src="img/"+index+".jpg"; changbg(); } })(); } </script> </body> </html>
須要所有源碼地址:https://gitee.com/PengPeng8/LunBo.gitjava