Clone a div or an other element.

$(document).ready(function() { var cloned = $('#id').clone(); // how to use <DIV id=id></DIV> });

29. 使元素居屏幕中间位置

Center an element in the center of your screen.

$(document).ready(function() { jQuery.fn.center = function () { this.css("position","absolute"); this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px"); this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px"); return this; } $("#id").center(); });

30. 写自己的选择器

Write your own selectors.

$(document).ready(function() { $.extend($.expr[':'], { moreThen1000px: function(a) { return $(a).width() > 1000; } }); $('.box:moreThen1000px').click(function() { // creating a simple js alert box alert('The element that you have clicked is over 1000 pixels wide'); }); });

31. 统计元素个数

Count an element.

$(document).ready(function() { $("p").size(); });

32. 使用自己的 Bullets

Want to use your own bullets instead of using the standard or images bullets?

$(document).ready(function() { $("ul").addClass("Replaced"); $("ul > li").prepend(" "); // how to use ul.Replaced { list-style : none; } });

33. 引用Google主机上的Jquery类库

Let Google host the jQuery script for you. This can be done in 2 ways.

//Example 1 > <SCRIPT type=text/javascript> google.load("jquery", "1.2.6"); google.setOnLoadCallback(function() { // do something }); => // Example 2:(the best and fastest way) =>

34. 禁用Jquery（动画）效果

Disable all jQuery effects

$(document).ready(function() { jQuery.fx.off = true; });

35. 与其他Javascript类库冲突解决方案

To avoid conflict other libraries on your website, you can use this jQuery Method, and assign a different variable name instead of the dollar sign.

$(document).ready(function() { var $jq = jQuery.noConflict(); $jq('#id').show(); }); 原文链接地址: