| 标题 | csshover.htc解决IE6下hover的兼容问题 |
| 范文 | 在IE6下，只支持a:hover的样式，不支持其他标签的:hover样式，为了解决IE6的这个hover兼容的问题，就要用到csshover.htc文件了 下面是csshover.htc的内容 <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> 这段代码粘贴后在dw里保存为csshover.htc文件就可以了 下面是在页面中因为这个文件，引入方法如下： <style type="text/css" media="screen"> body { behavior: url(csshover.htc); } /*注意路径*/ </style> 现在就可以为不是a标签的其他标签定义:hover样式了，赶紧试试吧 |
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