代码如下所示：
复制代码代码如下:
<!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=utf-8" />
<title>用CSS3实现Win8风格的方格导航菜单效果</title>
<style>
#about {
color: #999;
text-align: center;
font: 0.9em Arial, Helvetica;
}
#about a {
color: #777;
}
.menu {
width: 620px;
margin: 100px auto;
padding: 15px;
list-style: none;
counter-reset: li;
background: #eee;
-moz-box-shadow: 0 1px 2px rgba(0, 0, 0, .1) inset;
-webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .1) inset;
box-shadow: 0 1px 2px rgba(0, 0, 0, .1) inset;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
}
.menu:before, .menu:after {
content: "";
display: table;
}
.menu:after {
clear: both;
}
.menu {
zoom:1;
}
/* -------------------------------- */ </p>
<p>.menu li {
position: relative;
float: left;
cursor: pointer;
height: 120px;
width: 200px;
margin: 10px 0 0 10px;
color: #fff;
}
.menu li:hover, .menu li:focus {
background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(255, 255, 255, .2)), to(rgba(255, 255, 255, 0)));
background-image: -webkit-linear-gradient(top, rgba(255, 255, 255, .2), rgba(255, 255, 255, 0));
background-image: -moz-linear-gradient(top, rgba(255, 255, 255, .2), rgba(255, 255, 255, 0));
background-image: -ms-linear-gradient(top, rgba(255, 255, 255, .2), rgba(255, 255, 255, 0));
background-image: -o-linear-gradient(top, rgba(255, 255, 255, .2), rgba(255, 255, 255, 0));
background-image: linear-gradient(top, rgba(255, 255, 255, .2), rgba(255, 255, 255, 0));
}
.menu .cover {
z-index: 2;
}
.menu .cover:focus {
outline: 0;
}</p>
<p>/* -------------------------------- */</p>
<p>.menu li::after {
content: counter(li);
counter-increment: li;
font: italic bold 10px serif, georgia;
position: absolute;
color: rgba(255, 255, 255, .1);
opacity: 0;
-webkit-transition: all .2s ease-out;
-moz-transition: all .2s ease-out;
-ms-transition: all .2s ease-out;
-o-transition: all .2s ease-out;
transition: all .2s ease-out;
}
.menu li:hover::after, .menu li:focus::after {
font-size: 100px;
opacity: 1;
}
.menu .cover::after {
z-index: -1;
}</p>
<p>/* -------------------------------- */ </p>
<p>.menu li:nth-child(1), .menu li:nth-child(2), .menu li:nth-child(3) {
margin-top: 0;
}
.menu li:nth-child(1), .menu li:nth-child(4), .menu li:nth-child(7) {
margin-left: 0;
}</p>
<p>/* -------------------------------- */ </p>
<p>.menu li:nth-child(1), .menu li:nth-child(1) .content, .menu li:nth-child(1) .close {
background-color: #2c618f;
}
.menu li:nth-child(2), .menu li:nth-child(2) .content, .menu li:nth-child(2) .close {
background-color: #91ab31;
}
.menu li:nth-child(3), .menu li:nth-child(3) .content, .menu li:nth-child(3) .close {
background-color: #714a28;
}
.menu li:nth-child(4), .menu li:nth-child(4) .content, .menu li:nth-child(4) .close {
background-color: #e58600;
}
.menu li:nth-child(5), .menu li:nth-child(5) .content, .menu li:nth-child(5) .close {
background-color: #c33a00;
}
.menu li:nth-child(6), .menu li:nth-child(6) .content, .menu li:nth-child(6) .close {
background-color: #7f5dac;
}
.menu li:nth-child(7), .menu li:nth-child(7) .content, .menu li:nth-child(7) .close {
background-color: #5672b7;
}
.menu li:nth-child(8), .menu li:nth-child(8) .content, .menu li:nth-child(8) .close {
background-color: #69003f;
}
.menu li:nth-child(9), .menu li:nth-child(9) .content, .menu li:nth-child(9) .close {
background-color: #393043;
}
/* -------------------------------- */</p>
<p>.menu .content {
opacity: 0;
display: none\9;
overflow: hidden;
font: 12px Arial, Helvetica;
position: absolute;
height: 120px;
width: 200px; /* Ideally: height: 100%; width: 100%; but works at it should just in FF */
-webkit-transition: all .3s ease-out;
-moz-transition: all .3s ease-out;
-ms-transition: all .3s ease-out;
-o-transition: all .3s ease-out;
transition: all .3s ease-out;
}
.menu .expanded {
opacity: .95;
display: block\9;
overflow: visible;
padding: 40px;
height: 300px;
width: 540px; /* Cover the entire area */
}
.menu li:nth-child(3n) .content { /* 3,6,9 */
right: 0;
}
.menu li:nth-child(3n-1) .expanded { /* 2,5,8 */
left: 50%;
margin-left: -310px;
}
.menu li:nth-child(7) .content, /* 7,8,9 */ .menu li:nth-child(8) .content, .menu li:nth-child(9) .content {
bottom: 0;
}
.menu li:nth-child(4) .expanded, /* 4,5,6 */ .menu li:nth-child(5) .expanded, .menu li:nth-child(6) .expanded {
margin-top: -190px;
top: 50%;
}
/* -------------------------------- */ </p>
<p>.menu .title {
position: absolute;
height: 100%;
width: 100%;
text-align: center;
font: italic bold 1em/120px 'trebuchet MS', Arial, helvetica;
opacity: .2;
}
.menu li:hover .title {
opacity: .7;
}
/* -------------------------------- */</p>
<p>.menu .close {
display: none;
border: 5px solid #fff;
color: #fff;
cursor: pointer;
height: 40px;
width: 40px;
font: bold 20px/40px arial, helvetica;
position: absolute;
text-align: center;
top: -20px;
right: -20px;
-moz-border-radius: 40px;
-webkit-border-radius: 40px;
border-radius: 40px;
}
.menu .cover .close {
display: block;
}
</style>
<script src="/UploadFiles/2021-03-30/jquery-1.7.1.min.js"><!--[if (gte IE 6)&(lte IE 8)]>
<script>
(function(win) {
if (/*@cc_on!@*/true) return;
var doc = document;
var root = doc.documentElement;
var xhr = getXHRObject();
var ieVersion = /MSIE (\d+)/.exec(navigator.userAgent)[1];
if (doc.compatMode != 'CSS1Compat' || ieVersion<6 || ieVersion>8 || !xhr) {
return;
}
var selectorEngines = {
"NW" : "*.Dom.select",
"MooTools" : "$$",
"DOMAssistant" : "*.$",
"Prototype" : "$$",
"YAHOO" : "*.util.Selector.query",
"Sizzle" : "*",
"jQuery" : "*",
"dojo" : "*.query"
};</p>
<p> var selectorMethod;
var enabledWatchers = []; // array of :enabled/:disabled elements to poll
var ie6PatchID = 0; // used to solve ie6's multiple class bug
var patchIE6MultipleClasses = true; // if true adds class bloat to ie6
var namespace = "slvzr";
// Stylesheet parsing regexp's
var RE_COMMENT = /(\/\*[^*]*\*+([^\/][^*]*\*+)*\/)\s*/g;
var RE_IMPORT = /@import\s*(?:(?:(?:url\(\s*(['"]?)(.*)\1)\s*\))|(?:(['"])(.*)\3))[^;]*;/g;
var RE_ASSET_URL = /\burl\(\s*(["']?)(?!data:)([^"')]+)\1\s*\)/g;
var RE_PSEUDO_STRUCTURAL = /^:(empty|(first|last|only|nth(-last)?)-(child|of-type))$/;
var RE_PSEUDO_ELEMENTS = /:(:first-(?:line|letter))/g;
var RE_SELECTOR_GROUP = /(^|})\s*([^\{]*?[\[:][^{]+)/g;
var RE_SELECTOR_PARSE = /([ +~>])|(:[a-z-]+(?:\(.*?\)+)?)|(\[.*?\])/g;
var RE_LIBRARY_INCOMPATIBLE_PSEUDOS = /(:not\()?:(hover|enabled|disabled|focus|checked|target|active|visited|first-line|first-letter)\)?/g;
var RE_PATCH_CLASS_NAME_REPLACE = /[^\w-]/g;
// HTML UI element regexp's
var RE_INPUT_ELEMENTS = /^(INPUT|SELECT|TEXTAREA|BUTTON)$/;
var RE_INPUT_CHECKABLE_TYPES = /^(checkbox|radio)$/;</p>
<p> // Broken attribute selector implementations (IE7/8 native [^=""], [$=""] and [*=""])
var BROKEN_ATTR_IMPLEMENTATIONS = ieVersion>6 ? /[\$\^*]=(['"])\1/ : null;</p>
<p> // Whitespace normalization regexp's
var RE_TIDY_TRAILING_WHITESPACE = /([(\[+~])\s+/g;
var RE_TIDY_LEADING_WHITESPACE = /\s+([)\]+~])/g;
var RE_TIDY_CONSECUTIVE_WHITESPACE = /\s+/g;
var RE_TIDY_TRIM_WHITESPACE = /^\s*((?:[\S\s]*\S)?)\s*$/;
// String constants
var EMPTY_STRING = "";
var SPACE_STRING = " ";
var PLACEHOLDER_STRING = "$1";
function patchStyleSheet( cssText ) {
return cssText.replace(RE_PSEUDO_ELEMENTS, PLACEHOLDER_STRING).
replace(RE_SELECTOR_GROUP, function(m, prefix, selectorText) {
var selectorGroups = selectorText.split(",");
for (var c = 0, cs = selectorGroups.length; c < cs; c++) {
var selector = normalizeSelectorWhitespace(selectorGroups[c]) + SPACE_STRING;
var patches = [];
selectorGroups[c] = selector.replace(RE_SELECTOR_PARSE,
function(match, combinator, pseudo, attribute, index) {
if (combinator) {
if (patches.length>0) {
applyPatches( selector.substring(0, index), patches );
patches = [];
}
return combinator;
}
else {
var patch = (pseudo) ? patchPseudoClass( pseudo ) : patchAttribute( attribute );
if (patch) {
patches.push(patch);
return "." + patch.className;
}
return match;
}
}
);
}
return prefix + selectorGroups.join(",");
});
};
function patchAttribute( attr ) {
return (!BROKEN_ATTR_IMPLEMENTATIONS || BROKEN_ATTR_IMPLEMENTATIONS.test(attr)) ?
{ className: createClassName(attr), applyClass: true } : null;
};
function patchPseudoClass( pseudo ) {
var applyClass = true;
var className = createClassName(pseudo.slice(1));
var isNegated = pseudo.substring(0, 5) == ":not(";
var activateEventName;
var deactivateEventName;
if (isNegated) {
pseudo = pseudo.slice(5, -1);
}
var bracketIndex = pseudo.indexOf("(")
if (bracketIndex > -1) {
pseudo = pseudo.substring(0, bracketIndex);
}
// check we're still dealing with a pseudo-class
if (pseudo.charAt(0) == ":") {
switch (pseudo.slice(1)) {</p>
<p> case "root":
applyClass = function(e) {
return isNegated ? e != root : e == root;
}
break;</p>
<p> case "target":
// :target is only supported in IE8
if (ieVersion == 8) {
applyClass = function(e) {
var handler = function() {
var hash = location.hash;
var hashID = hash.slice(1);
return isNegated ? (hash == EMPTY_STRING || e.id != hashID) : (hash != EMPTY_STRING && e.id == hashID);
};
addEvent( win, "hashchange", function() {
toggleElementClass(e, className, handler());
})
return handler();
}
break;
}
return false;
case "checked":
applyClass = function(e) {
if (RE_INPUT_CHECKABLE_TYPES.test(e.type)) {
addEvent( e, "propertychange", function() {
if (event.propertyName == "checked") {
toggleElementClass( e, className, e.checked !== isNegated );
}
})
}
return e.checked !== isNegated;
}
break;
case "disabled":
isNegated = !isNegated;</p>
<p> case "enabled":
applyClass = function(e) {
if (RE_INPUT_ELEMENTS.test(e.tagName)) {
addEvent( e, "propertychange", function() {
if (event.propertyName == "$disabled") {
toggleElementClass( e, className, e.$disabled === isNegated );
}
});
enabledWatchers.push(e);
e.$disabled = e.disabled;
return e.disabled === isNegated;
}
return pseudo == ":enabled" ? isNegated : !isNegated;
}
break;
case "focus":
activateEventName = "focus";
deactivateEventName = "blur";
case "hover":
if (!activateEventName) {
activateEventName = "mouseenter";
deactivateEventName = "mouseleave";
}
applyClass = function(e) {
addEvent( e, isNegated ? deactivateEventName : activateEventName, function() {
toggleElementClass( e, className, true );
})
addEvent( e, isNegated ? activateEventName : deactivateEventName, function() {
toggleElementClass( e, className, false );
})
return isNegated;
}
break;
default:
if (!RE_PSEUDO_STRUCTURAL.test(pseudo)) {
return false;
}
break;
}
}
return { className: className, applyClass: applyClass };
};
function applyPatches(selectorText, patches) {
var elms;
var domSelectorText = selectorText.replace(RE_LIBRARY_INCOMPATIBLE_PSEUDOS, EMPTY_STRING);
if (domSelectorText == EMPTY_STRING || domSelectorText.charAt(domSelectorText.length - 1) == SPACE_STRING) {
domSelectorText += "*";
}
try {
elms = selectorMethod( domSelectorText );
} catch (ex) {
// #DEBUG_START
log( "Selector '" + selectorText + "' threw exception '" + ex + "'" );
// #DEBUG_END
}</p>
<p>
if (elms) {
for (var d = 0, dl = elms.length; d < dl; d++) {
var elm = elms[d];
var cssClasses = elm.className;
for (var f = 0, fl = patches.length; f < fl; f++) {
var patch = patches[f];
if (!hasPatch(elm, patch)) {
if (patch.applyClass && (patch.applyClass === true || patch.applyClass(elm) === true)) {
cssClasses = toggleClass(cssClasses, patch.className, true );
}
}
}
elm.className = cssClasses;
}
}
};
function hasPatch( elm, patch ) {
return new RegExp("(^|\\s)" + patch.className + "(\\s|$)").test(elm.className);
};
function createClassName( className ) {
return namespace + "-" + ((ieVersion == 6 && patchIE6MultipleClasses) ?
ie6PatchID++
:
className.replace(RE_PATCH_CLASS_NAME_REPLACE, function(a) { return a.charCodeAt(0) }));
};
function log( message ) {
if (win.console) {
win.console.log(message);
}
};
function trim( text ) {
return text.replace(RE_TIDY_TRIM_WHITESPACE, PLACEHOLDER_STRING);
};
function normalizeWhitespace( text ) {
return trim(text).replace(RE_TIDY_CONSECUTIVE_WHITESPACE, SPACE_STRING);
};
function normalizeSelectorWhitespace( selectorText ) {
return normalizeWhitespace(selectorText.
replace(RE_TIDY_TRAILING_WHITESPACE, PLACEHOLDER_STRING).
replace(RE_TIDY_LEADING_WHITESPACE, PLACEHOLDER_STRING)
);
};
function toggleElementClass( elm, className, on ) {
var oldClassName = elm.className;
var newClassName = toggleClass(oldClassName, className, on);
if (newClassName != oldClassName) {
elm.className = newClassName;
elm.parentNode.className += EMPTY_STRING;
}
};
function toggleClass( classList, className, on ) {
var re = RegExp("(^|\\s)" + className + "(\\s|$)");
var classExists = re.test(classList);
if (on) {
return classExists ? classList : classList + SPACE_STRING + className;
} else {
return classExists ? trim(classList.replace(re, PLACEHOLDER_STRING)) : classList;
}
};
// --[ addEvent() ]-----------------------------------------------------
function addEvent(elm, eventName, eventHandler) {
elm.attachEvent("on" + eventName, eventHandler);
};</p>
<p> // --[ getXHRObject() ]-------------------------------------------------
function getXHRObject()
{
if (win.XMLHttpRequest) {
return new XMLHttpRequest;
}
try {
return new ActiveXObject('Microsoft.XMLHTTP');
} catch(e) {
return null;
}
};
function loadStyleSheet( url ) {
xhr.open("GET", url, false);
xhr.send();
return (xhr.status==200) ? xhr.responseText : EMPTY_STRING;
};
function resolveUrl( url, contextUrl ) {
function getProtocolAndHost( url ) {
return url.substring(0, url.indexOf("/", 8));
};
if (/^https?:\/\//i.test(url)) {
return getProtocolAndHost(contextUrl) == getProtocolAndHost(url) ? url : null;
}
if (url.charAt(0)=="/") {
return getProtocolAndHost(contextUrl) + url;
}
var contextUrlPath = contextUrl.split(/[?#]/)[0]; // ignore query string in the contextUrl
if (url.charAt(0) != "?" && contextUrlPath.charAt(contextUrlPath.length - 1) != "/") {
contextUrlPath = contextUrlPath.substring(0, contextUrlPath.lastIndexOf("/") + 1);
}
return contextUrlPath + url;
};
function parseStyleSheet( url ) {
if (url) {
return loadStyleSheet(url).replace(RE_COMMENT, EMPTY_STRING).
replace(RE_IMPORT, function( match, quoteChar, importUrl, quoteChar2, importUrl2 ) {
return parseStyleSheet(resolveUrl(importUrl || importUrl2, url));
}).
replace(RE_ASSET_URL, function( match, quoteChar, assetUrl ) {
quoteChar = quoteChar || EMPTY_STRING;
return " url(" + quoteChar + resolveUrl(assetUrl, url) + quoteChar + ") ";
});
}
return EMPTY_STRING;
};
// --[ init() ]---------------------------------------------------------
function init() {
// honour the <base> tag
var url, stylesheet;
var baseTags = doc.getElementsByTagName("BASE");
var baseUrl = (baseTags.length > 0) ? baseTags[0].href : doc.location.href;
for (var c = 0; c < doc.styleSheets.length; c++) {
stylesheet = doc.styleSheets[c]
if (stylesheet.href != EMPTY_STRING) {
url = resolveUrl(stylesheet.href, baseUrl);
if (url) {
stylesheet.cssText = patchStyleSheet( parseStyleSheet( url ) );
}
}
}
if (enabledWatchers.length > 0) {
setInterval( function() {
for (var c = 0, cl = enabledWatchers.length; c < cl; c++) {
var e = enabledWatchers[c];
if (e.disabled !== e.$disabled) {
if (e.disabled) {
e.disabled = false;
e.$disabled = true;
e.disabled = true;
}
else {
e.$disabled = e.disabled;
}
}
}
},250)
}
};
ContentLoaded(win, function() {
// Determine the "best fit" selector engine
for (var engine in selectorEngines) {
var members, member, context = win;
if (win[engine]) {
members = selectorEngines[engine].replace("*", engine).split(".");
while ((member = members.shift()) && (context = context[member])) {}
if (typeof context == "function") {
selectorMethod = context;
init();
return;
}
}
}
});
function ContentLoaded(win, fn) {</p>
<p> var done = false, top = true,
init = function(e) {
if (e.type == "readystatechange" && doc.readyState != "complete") return;
(e.type == "load" ? win : doc).detachEvent("on" + e.type, init, false);
if (!done && (done = true)) fn.call(win, e.type || e);
},
poll = function() {
try { root.doScroll("left"); } catch(e) { setTimeout(poll, 50); return; }
init('poll');
};</p>
<p> if (doc.readyState == "complete") fn.call(win, EMPTY_STRING);
else {
if (doc.createEventObject && root.doScroll) {
try { top = !win.frameElement; } catch(e) { }
if (top) poll();
}
addEvent(doc,"readystatechange", init);
addEvent(win,"load", init);
}
};
})(this);
</script>
<![endif]-->
</head>
<body>
<ul class="menu">
<li tabindex="1"> <span class="title">One</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Two</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Three</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Four</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Five</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Six</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Seven</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Eight</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
<li tabindex="1"> <span class="title">Nine</span>
<div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse interdum dictum scelerisque. Morbi eu euismod lorem.</div>
</li>
</ul>
<script>
(function(){
// Append a close trigger for each block
$('.menu .content').append('<span class="close">x</span>');
// Show window
function showContent(elem){
hideContent();
elem.find('.content').addClass('expanded');
elem.addClass('cover');
}
// Reset all
function hideContent(){
$('.menu .content').removeClass('expanded');
$('.menu li').removeClass('cover');
}
// When a li is clicked, show its content window and position it above all
$('.menu li').click(function() {
showContent($(this));
});
// When tabbing, show its content window using ENTER key
$('.menu li').keypress(function(e) {
if (e.keyCode == 13) {
showContent($(this));
}
});</p>
<p> // When right upper close element is clicked - reset all
$('.menu .close').click(function(e) {
e.stopPropagation();
hideContent();
});
// Also, when ESC key is pressed - reset all
$(document).keyup(function(e) {
if (e.keyCode == 27) {
hideContent();
}
});
})();
</script>
</body>
</html>
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Swift Student Challenge 旨在支持和鼓舞下一代开发者、创作者和企业家。太平洋时间 3 月 28 日，我们将公布今年的获奖者名单。获奖者将有资格参加在 Apple Park 举办的特别活动。我们还会选出 50 名杰出获胜者，他们将受邀前往库比提诺，获得为期三天的非凡体验，包括参加 Apple Park 的特别活动。
RTX 5090要首发 性能要翻倍！三星展示GDDR7显存
三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。
首次推出的GDDR7内存模块密度为16GB，每个模块容量为2GB。其速度预设为32 Gbps（PAM3），但也可以降至28 Gbps，以提高产量和初始阶段的整体性能和成本效益。
据三星表示，GDDR7内存的能效将提高20%，同时工作电压仅为1.1V，低于标准的1.2V。通过采用更新的封装材料和优化的电路设计，使得在高速运行时的发热量降低，GDDR7的热阻比GDDR6降低了70%。