1.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");2. 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>*/3.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");
4.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;});});5. 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(){$(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout});});6. 制作等高的列 var max_height = 0;$("div.col").each(function(){if ($(this).height() > max_height) { max_height = $(this).height(); }});$("div.col").height(max_height);7. 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]-->
8.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";9. 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;}10. 禁用表单的回车键提交 $("#form").keypress(function(e) { if (e.which == 13) {return false; }});