横向三级展开的CSS菜单
#nav,
#nav ul {float:left; padding:0 0 5px 0; margin:0; list-style:none; font: 10px verdana, sans-serif; border:1px solid #000; border-color:#cea #9b7 #8a6 #deb; border-width:1px 2px 2px 1px; background:#fff; position:relative; z-index:200;}
#nav li li {background:#fff;}
* html #nav li {float:left;}
#nav li a {display:block; color:#888; margin:0 25px 0 10px; height:20px; line-height:20px; text-decoration:none; white-space:nowrap;}
#nav li:hover {position:relative; z-index:300;}
#nav ul {position:absolute; left:-9999px; top:-9999px;}
* html #nav, * html nav ul {width:1px;}
#nav li:hover > ul {left:-15px; margin-left:100%; top:-1px;}
#nav li:hover > ul ul {position:absolute; left:-9999px; top:-9999px; width:auto;}
#nav li:hover > a {text-decoration:underline; color:#7b5;}
#nav li:hover ul,
#nav li:hover li:hover ul,
#nav li:hover li:hover li:hover ul,
#nav li:hover li:hover li:hover li:hover ul,
#nav li:hover li:hover li:hover li:hover li:hover ul
{left:-15px; margin-left:100%; top:-1px;}
#nav li:hover ul ul,
#nav li:hover li:hover ul ul,
#nav li:hover li:hover li:hover ul ul,
#nav li:hover li:hover li:hover li:hover ul ul
{position:absolute; left:-9999px; top:-9999px;}
#nav li:hover a,
#nav li:hover li:hover a,
#nav li:hover li:hover li:hover a,
#nav li:hover li:hover li:hover li:hover a,
#nav li:hover li:hover li:hover li:hover li:hover a,
#nav li:hover li:hover li:hover li:hover li:hover li:hover a
{text-decoration:underline; color:#7b5;}
#nav li:hover li a,
#nav li:hover li:hover li a,
#nav li:hover li:hover li:hover li a,
#nav li:hover li:hover li:hover li:hover li a,
#nav li:hover li:hover li:hover li:hover li:hover li a
{text-decoration:none; color:#888;}
stuHover = function() {
var cssRule;
var newSelector;//
for (var i = 0; i < document.styleSheets.length; i++)
for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
{
cssRule = document.styleSheets[i].rules[x];
if (cssRule.selectorText.indexOf("LI:hover") != -1)
{
newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
}
}
var getElm = document.getElementById("nav").getElementsByTagName("LI");
for (var i=0; i
getElm[i].οnmοuseοver=function() {
this.className+=" iehover";
}
getElm[i].οnmοuseοut=function() {
this.className=this.className.replace(new RegExp(" iehover\\b"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", stuHover);
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