Telescopic menu, we must have seen it, the implementation of the method is also many, in the next article for you to introduce the use of JS is how to achieve, the need for friends can refer to the following
The code is as follows: <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <html> <head> <title> Scalable menu </title> <style> <!- - body{ background-color: #ffdee0; } #navigation { width:200px; ; } #navigation > UL { list-style-type:none;/* do not display bullets */ margin:0px; padding:0px; } #navigation > Ul > Li { border-bottom:1px solid #ED9F9F; * Add underscore */ } #navigation > UL > li > a{ display:block;/* block display */ padding:5px 5px 5px 0.5em; text-decoration:none; border-l EFT:12PX Solid #711515/* The thick red edge on the left */ border-right:1px solid #711515;/* Right Shadow */ } #navigation > Ul > Li > A:link, #navigation > Ul > li > a:visited{ background-color: #c11136; color: #FFFFFF; }& nbsp #navigation > Ul > li > a:hover{/* mouse over */ background-color: #990020/* Change background color */ color: #ffff00; * Change text color */ } &N Bsp /* submenu CSS style */ #navigation ul li ul{ list-style-type:none; margin:0px; padding:0px 0px 0px 0px; } #navigation ul Li ul li{ border-top:1px solid #ED9F9F; } #navigation ul Li ul Li a{& nbsp display:block; padding:3px 3px 3px 0.5em; text-decoration:none; border-left:28px solid #a71f1f; BORDER-RIGHT:1PX solid #711515; } #navigation ul Li ul Li A:link, #navigation ul Li ul Li A:visited{&nb Sp Background-color: #e85070; color: #FFFFFF; } #navigation ul Li ul Li a:hover{ background-color:# c2425d; color: #ffff00; } #navigation ul li ul.myhide{/* Hide submenu */ display:none; } #nav Igation ul li ul.myshow{/* Display submenu */ display:block; } --> </style> <script Langu age= "JavaScript" >&NBsp function change () { //through the parent element Li, find the sibling element ul var oseconddiv = this.parentNode.getElementsByTagName ("ul") [0]; //CSS alternating to realize explicit, hidden if (Oseconddiv.classname = = "Myhide") Oseconddiv.classname = "Myshow"; Else Oseconddiv.classname = "Myhide"; } window.onload = function () { var Oul = document.getElementById ("Listul"); var aLi = oul.childnodes;//child element var oa; for (Var i=0;i<ali.length;i++) { //If the child element is Li , and this LI has submenu ul if (ali[i].tagname = = "LI" && ali[i].getelementsbytagname ("ul"). Length) { OA = Ali[i]. firstchild;//Find hyperlinks Oa.onclick = change;//Dynamic Add click function } } } </script> </head > <body> <div id= "navigation" > <ul id= "Listul" > <li><a href= "#" >Home</a></li> <li><a href= "#" >News</a> <ul class= "Myhide" > <li><a href= "#" >lastest NEWS</A></LI≫ <li><a href= "#" >all news</a></li> </ul> </li> <li ><a href= "#" >Sports</a> <ul class= "myhide" > <li><a href= "#" >basketball </a></li> <li><a href= "#" >Football</a></li> <li><a href= " # ">Volleyball</a></li> </ul> </li> <li><a href=" # "> weather</a> <ul class= "myhide" > <li><a href= "#" >today ' s weather</a></ li> <li><a href= "#" >Forecast</a></li> </ul> </li> <li><a href= "#" >contact me</a></li> </ul> </div> </body > </html>