这是用DIV+CSS+JS构成的树型菜单，采用列表,符合WEB标准，在大多数WIN浏览器下，兼容性不错，xhtml见效果页,我现在做的是二个菜单,如果需要添加,可把<ul class="collapsed" id="submenuid2">......</ul>之间的内容加上去,"submenuid"加1,查看效果。
CSS代码
body { margin: 0px; padding: 0; font: 12px "Lucida Grande", Verdana, Arial, Helvetica, sans-serif; background: #FFFFFF; text-align: center;}
ul{ margin: 0; padding: 0; list-style: none;}
#treenav { margin: 10px; text-align: left;}
#treenav ul li { margin: 1px 0; padding: 0; font-size: 11px;}
#treenav ul.expanded { display: block;}
#treenav ul.expanded,#treenav ul.collapsed { margin: 5px 10px;}
#treenav ul.collapsed { display: none;}
.expanded li,.collapsed li{ border-bottom: 1px dashed #CCCCCC; width: 100px;}
.listhead { font-weight: bold; display: block; font-size: 12px; color: #333333; background: #F1F1F1; padding: 3px; width: 120px; margin: 1px 0;}
#treenav a { text-decoration: none; color: #666666;}
#treenav a:hover { color: #990000;}
JS代码
function toggleMenu(id){
element = document.getElementById(id);
element.className = (element.className.toLowerCase() == 'expanded'?'collapsed':'expanded');
}
onload = function() {
toggleMenu('submenuid');
}