图片预加载
- (function($) {
- var cache = [];
- // Arguments are image paths relative to the current page.
- $.preLoadImages = function() {
- var args_len = arguments.length;
- for (var i = args_len; i--;) {
- var cacheImage = document.createElement('img');
- cacheImage.src = arguments[i];
- cache.push(cacheImage);
- }
- }
- jQuery.preLoadImages("image1.gif", "/path/to/image2.png");
在新窗口打开链接 (target=”blank”)
- $('a[@rel$='external']').click(function(){
- this.target = "_blank";
- });
- /*
- Usage:
- <a href="http://www.catswhocode.com" rel="external">catswhocode.com</a>
- */
当支持 JavaScript 时为 body 增加 class
- /* 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 */
- $('body').addClass('hasJS');
平滑滚动页面到某个锚点
- $(document).ready(function() {
- $("a.topLink").click(function() {
- $("html, body").animate({
- scrollTop: $($(this).attr("href")).offset().top + "px"
- }, {
- duration: 500,
- easing: "swing"
- });
- return false;
- });
- });
鼠标滑动时的渐入和渐出
- $(document).ready(function(){
- $(".thumbs img").fadeTo("slow", 0.6); // This sets the opacity of the thumbs to fade down to 60% when the page loads
- $(".thumbs img").hover(function(){
- $(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover
- },function(){
- $(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout
- });
- });
制作等高的列
- var max_height = 0;
- $("div.col").each(function(){
- if ($(this).height() > max_height) { max_height = $(this).height(); }
- });
- $("div.col").height(max_height);
在一些老的浏览器上启用 HTML5 的支持
- (function(){
- if(!/*@cc_on!@*/0)
- return;
- 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])}
- })()
- //然后在head中引入该js
- <!--[if lt IE 9]>
- <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
- <![endif]-->
测试浏览器是否支持某些 CSS3 属性
- var supports = (function() {
- var div = document.createElement('div'),
- vendors = 'Khtml Ms O Moz Webkit'.split(' '),
- len = vendors.length;
- return function(prop) {
- if ( prop in div.style ) return true;
- prop = prop.replace(/^[a-z]/, function(val) {
- return val.toUpperCase();
- });
- while(len--) {
- if ( vendors[len] + prop in div.style ) {
- // browser supports box-shadow. Do what you need.
- // Or use a bang (!) to test if the browser doesn't.
- return true;
- }
- }
- return false;
- };
- })();
- if ( supports('textShadow') ) {
- document.documentElement.className += ' textShadow';
获取 URL 中传递的参数
- $.urlParam = function(name){
- var results = new RegExp('[\\?&]' + name + '=([^&#]*)').exec(window.location.href);
- if (!results) { return 0; }
- return results[1] || 0;
- }
禁用表单的回车键提交
- $("#form").keypress(function(e) {
- if (e.which == 13) {
- return false;
- }
- });
原文:http://www.oschina.net/code/snippet_12_7271
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