[代码] 图片预加载
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(function($) {
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var cache = [];
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// Arguments are image paths relative to the current page.
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$.preLoadImages = function() {
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var args_len = arguments.length;
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for (var i = args_len; i--;) {
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var cacheImage = document.createElement('img');
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cacheImage.src = arguments[i];
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cache.push(cacheImage);
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}
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}
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jQuery.preLoadImages("image1.gif", "/path/to/image2.png");
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[代码] 在新窗口打开链接 (target=”blank”)
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$('a[@rel$='external']').click(function(){
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this.target = "_blank";
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}); |
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/* |
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Usage:
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<a href="http://www.catswhocode.com" rel="external">catswhocode.com</a>
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*/ |
[代码] 当支持 JavaScript 时为 body 增加 class
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/* 该代码只有1行，但是最简单的用来检测浏览器是否支持 JavaScript 的方法，如果支持 JavaScript 就在 body 元素增加一个 hasJS 的 class */ |
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$('body').addClass('hasJS');
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[代码] 平滑滚动页面到某个锚点
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$(document).ready(function() {
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$("a.topLink").click(function() {
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$("html, body").animate({
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scrollTop: $($(this).attr("href")).offset().top + "px"
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}, {
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duration: 500,
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easing: "swing"
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});
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return false;
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});
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}); |
[代码] 鼠标滑动时的渐入和渐出
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$(document).ready(function(){
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$(".thumbs img").fadeTo("slow", 0.6); // This sets the opacity of the thumbs to fade down to 60% when the page loads
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$(".thumbs img").hover(function(){
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$(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover
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},function(){
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$(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout
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});
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}); |
[代码] 制作等高的列
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var max_height = 0;
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$("div.col").each(function(){
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if ($(this).height() > max_height) { max_height = $(this).height(); }
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}); |
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$("div.col").height(max_height);
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[代码] 在一些老的浏览器上启用 HTML5 的支持
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(function(){
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if(!/*@cc_on!@*/0)
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return;
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var e ="abbr,article,aside,audio,bb,canvas,datagrid,datalist,details,dialog,eventsource,figure,footer,header,hgroup,mark,menu,meter,nav,output,progress,section,time,video".split(','),i=e.length;while(i--){document.createElement(e[i])}
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})() |
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//然后在head中引入该js |
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<!--[if lt IE 9]>
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<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
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<![endif]--> |
[代码] 测试浏览器是否支持某些 CSS3 属性
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var supports = (function() {
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var div = document.createElement('div'),
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vendors = 'Khtml Ms O Moz Webkit'.split(' '),
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len = vendors.length;
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return function(prop) {
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if ( prop in div.style ) return true;
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prop = prop.replace(/^[a-z]/, function(val) {
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return val.toUpperCase();
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});
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while(len--) {
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if ( vendors[len] + prop in div.style ) {
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// browser supports box-shadow. Do what you need.
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// Or use a bang (!) to test if the browser doesn't.
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return true;
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}
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}
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return false;
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};
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})(); |
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if ( supports('textShadow') ) {
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document.documentElement.className += ' textShadow';
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[代码] 获取 URL 中传递的参数
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$.urlParam = function(name){
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var results = new RegExp('[\\?&]' + name + '=([^&#]*)').exec(window.location.href);
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if (!results) { return 0; }
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return results[1] || 0;
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} |
[代码] 禁用表单的回车键提交
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$("#form").keypress(function(e) {
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if (e.which == 13) {
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return false;
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}
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}); |