<!doctype html> <html> <head> <title>图片轮播</title> <style> p{ border: 1px solid red; width:218px; height: 218px; } .show{ display: inline-block; } .hide{ display: none; } </style> <meta charset="utf-8"> </head> <body> <!-- onmouseover="" 鼠标悬停事件 onmouseout="" 鼠标离开事件--> <p 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"/> </p> <script> //轮播 var id = null; var index = 0; function lunbo() { //轮播次数 id = setinterval(function () { index++; //获取所有图片 var imgs = document.getelementsbytagname("img"); //将他们隐藏 for (var i = 0; i < imgs.length; i++) { imgs[i].classname = "hide"; } //将下一张隐藏 var next = index % imgs.length; imgs[next].classname = "show"; }, 2000); } function pause1() { clearinterval(id); } //在页面加载后自动轮播 lunbo(); </script> </body> </html>
联级菜单实现
<!doctype html> <html> <head> <meta charset="utf-8"> <!-- <script type="text/javascript" src="demo6.js"> </script> --> <title>联动菜单</title> </head> <body> 省： <select id="province" onchange="chg();"> <option value="-1">请选择</option> <option value="0">河北省</option> <option value="1">山东省</option> <option value="2">山西省</option> </select> 市： <select id="city"> <option>请选择</option> </select> <script> // 模拟加载城市 function loadcities() { return[ ["石家庄","廊坊","保定"], ["济南","青岛","德州"], ["太原","大同","阳泉"] ]; } var cities=loadcities(); console.log(cities); function chg() { var sel1=document.getelementbyid("province"); //获取省份 var pindex=sel1.value; //获取该省份的城市 var pcities=cities[pindex]; console.log(pcities); //删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]); } //在增加该省份城市 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>
总结
以上就是关于javascript如何实现图片连播以及联级菜单的实例的详细内容。