Simple tree menu, tree menu
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN "" http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <Html xmlns =" http://www.w3.org/1999/xhtml "> <Head> <meta http-equiv =" Content-Type "content =" text/html; charset = gb2312 "/> <title> Create a simple tree menu </title> <style type =" text/css "> body {font-size: 13px; line-height: 20px;} a {font-size: 13px; color: #000000; text-decoration: none;} a: hover {font-size: 13px; color: # ff0000 ;} img {vertical-align: middle; border: 0; list-style-type: none ;}. no_circle {list-style-type: none;/* set the type of the list item flag to none */display: none ;} </style> <script type = "text/javascript"> function show () {if (document. getElementById ("art "). style. display = 'block') {document. getElementById ("art "). style. display = 'none'; // If the triggered ul is displayed, it is hidden} else {document. getElementById ("art "). style. display = 'block'; // if the triggered ul is in the hidden state, it is displayed.} function show2 () {if (document. getElementById ("tietu "). style. display = 'block') {document. getElementById ("tietu "). style. display = 'none'; // If the triggered ul is displayed, it is hidden} else {document. getElementById ("tietu "). style. display = 'block'; // if the triggered ul is in the hidden state, it is displayed.} function show3 () {if (document. getElementById ("fangchan "). style. display = 'block') {document. getElementById ("fangchan "). style. display = 'none'; // If the triggered ul is displayed, it is hidden} else {document. getElementById ("fangchan "). style. display = 'block'; // if the triggered ul is in the hidden state, it is displayed.} function show4 () {if (document. getElementById ("yule "). style. display = 'block') {document. getElementById ("yule "). style. display = 'none'; // If the triggered ul is displayed, it is hidden} else {document. getElementById ("yule "). style. display = 'block'; // If the ul is hidden, show now }</script>