<!DOCTYPE html><html> <head> <title>圖片輪播</title> <style> div{ border: 1px solid red; width:218px; height: 218px; } .show{ display: inline-block; } .hide{ display: none; } </style> <meta charset="UTF-8"> </head> <body> <!-- onmouseover="" 鼠標(biāo)懸停事件 onmouseout="" 鼠標(biāo)離開事件--> <div onmouseover="pause1();" onmouseout="lunbo();"> <img src="../images/01.jpg" class="show"/> <img src="../images/02.jpg" class="hide"/> <img src="../images/03.jpg" class="hide"/> <img src="../images/04.jpg" class="hide"/> <img src="../images/05.jpg" class="hide"/> <img src="../images/06.jpg" class="hide"/> </div> <script> //輪播 var id = null; var index = 0; function lunbo() { //輪播次數(shù) id = setInterval(function () { index++; //獲取所有圖片 var imgs = document.getElementsByTagName("img"); //將他們隱藏 for (var i = 0; i < imgs.length; i++) { imgs[i].className = "hide"; } //將下一張隱藏 var next = index % imgs.length; imgs[next].className = "show"; }, 2000); } function pause1() { clearInterval(id); } //在頁(yè)面加載后自動(dòng)輪播 lunbo(); </script> </body></html>聯(lián)級(jí)菜單實(shí)現(xiàn)
<!DOCTYPE html><html><head><meta charset="UTF-8"><!-- <script type="text/javascript" src="demo6.js"></script> --><title>聯(lián)動(dòng)菜單</title></head><body> ?。?<select id="province" onchange="chg();"> <option value="-1">請(qǐng)選擇</option> <option value="0">河北省</option> <option value="1">山東省</option> <option value="2">山西省</option> </select> 市： <select id="city"> <option>請(qǐng)選擇</option> </select> <script> // 模擬加載城市 function loadCities() { return[ ["石家莊","廊坊","保定"], ["濟(jì)南","青島","德州"], ["太原","大同","陽(yáng)泉"] ]; } var cities=loadCities(); console.log(cities); function chg() { var sel1=document.getElementById("province"); //獲取省份 var pindex=sel1.value; //獲取該省份的城市 var pcities=cities[pindex]; console.log(pcities); //刪除城市下拉列表中的所有城市 var sel2=document.getElementById("city"); var options=sel2.getElementsByTagName("option"); console.log(options); for(var i=options.length-1;i;i--){ sel2.removeChild(options[i]); } //在增加該省份城市 if(pcities){ for(var i=0;i<pcities.length;i++){ var opn=document.createElement("option"); opn.innerHTML=pcities[i]; sel2.appendChild(opn); } } } </script></body></html>總結(jié)
以上所述是小編給大家介紹的基于JavaScript實(shí)現(xiàn)圖片連播和聯(lián)級(jí)菜單實(shí)例代碼，希望對(duì)大家有所幫助，如果大家有任何疑問請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)武林網(wǎng)網(wǎng)站的支持！
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