最近接到一个多店的外贸网站，程序采用的Magento来制作的,Magento太强大了.根据客户要求左侧的分类当鼠标移上去,div的边框显示亮色,但是使用div:hover做好后,发现IE6下竟然不生效,然后查下资料说div:hover在ff、ie7、ie8中都能实现唯独在IE6.0、Firefox2.0、Opera 9.23中不生效.但是人家淘宝网上都可以做出来的效果我们为什么不能做出来啊,然后就查找解决办法,ie6是用的css1.0，不支持非a的hover伪类，若想实现hover效果需要写js来实现了。经过一翻测试终于成功了.

下面把兼容js文件发出来给大家分享下：

/*解决ie6.0 的hover兼容问题*/
<attach event=”ondocumentready” handler=”parseStylesheets” />
<script>

var csshoverReg = /(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i,
currentSheet, doc = window.document, hoverEvents = [], activators = {
onhover:{on:’onmouseover’, off:’onmouseout’},
onactive:{on:’onmousedown’, off:’onmouseup’}
}

function parseStylesheets() {
if(!/MSIE (5|6)/.test(navigator.userAgent)) return;
window.attachEvent(‘onunload’, unhookHoverEvents);
var sheets = doc.styleSheets, l = sheets.length;
for(var i=0; i<l; i++)
parseStylesheet(sheets[i]);
}
function parseStylesheet(sheet) {
if(sheet.imports) {
try {
var imports = sheet.imports, l = imports.length;
for(var i=0; i<l; i++) parseStylesheet(sheet.imports[i]);
} catch(securityException){}
}

try {
var rules = (currentSheet = sheet).rules, l = rules.length;
for(var j=0; j<l; j++) parseCSSRule(rules[j]);
} catch(securityException){}
}

function parseCSSRule(rule) {
var select = rule.selectorText, style = rule.style.cssText;
if(!csshoverReg.test(select) || !style) return;

var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, ‘on$1′);
var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, ‘.$2′ + pseudo);
var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
var affected = select.replace(/:(hover|active).*$/, ”);
var elements = getElementsBySelect(affected);
if(elements.length == 0) return;

currentSheet.addRule(newSelect, style);
for(var i=0; i<elements.length; i++)
new HoverElement(elements[i], className, activators[pseudo]);
}

function HoverElement(node, className, events) {
if(!node.hovers) node.hovers = {};
if(node.hovers[className]) return;
node.hovers[className] = true;
hookHoverEvent(node, events.on, function() { node.className += ‘ ‘ + className; });
hookHoverEvent(node, events.off, function() { node.className = node.className.replace(new RegExp(‘\\s+’+className, ‘g’),”); });
}
function hookHoverEvent(node, type, handler) {
node.attachEvent(type, handler);
hoverEvents[hoverEvents.length] = {
node:node, type:type, handler:handler
};
}

function unhookHoverEvents() {
for(var e,i=0; i<hoverEvents.length; i++) {
e = hoverEvents[i];
e.node.detachEvent(e.type, e.handler);
}
}

function getElementsBySelect(rule) {
var parts, nodes = [doc];
parts = rule.split(‘ ‘);
for(var i=0; i<parts.length; i++) {
nodes = getSelectedNodes(parts[i], nodes);
}    return nodes;
}
function getSelectedNodes(select, elements) {
var result, node, nodes = [];
var identify = (/\#([a-z0-9_-]+)/i).exec(select);
if(identify) {
var element = doc.getElementById(identify[1]);
return element? [element]:nodes;
}

var classname = (/\.([a-z0-9_-]+)/i).exec(select);
var tagName = select.replace(/(\.|\#|\:)[a-z0-9_-]+/i, ”);
var classReg = classname? new RegExp(‘\\b’ + classname[1] + ‘\\b’):false;
for(var i=0; i<elements.length; i++) {
result = tagName? elements[i].all.tags(tagName):elements[i].all;
for(var j=0; j<result.length; j++) {
node = result[j];
if(classReg && !classReg.test(node.className)) continue;
nodes[nodes.length] = node;
}
}

return nodes;
}
</script>

在页面中添加引用

body
{
/*
首先不支持绝对路径，只支持相对路径。
其次，是相对于当前ASPX网页的相对路径，和CSS文件的位置无关。
*/
behavior: url(../css/hover.htc); /*可在IE6,7中对非<a>元素使用hover等伪类*/
}