1. 去除页面的右键菜单
$(document).ready(function(){
$(document).bind("contextmenu",function(e){
return false;
});
});
2、搜索输入框文字的消失
当鼠标获得焦点、失去焦点的时候，input输入框文字处理：
$(document).ready(function() {
$("input.text1").val("Enter your search text here");
textFill($('input.text1'));
});
function textFill(input){ //input focus text function
var originalvalue = input.val();
input.focus( function(){
if( $.trim(input.val()) == originalvalue ){ input.val(''); }
});
input.blur( function(){
if( $.trim(input.val()) == '' ){ input.val(originalvalue); }
});
}
3、新窗口打开页面
$(document).ready(function() {
//Example 1: Every link will open in a new window
$('a[href^="http://"]').attr("target", "_blank");
//Example 2: Links with the rel="external" attribute will only open in a new window
$('a[@rel$='external']').click(function(){
this.target = "_blank";
});
});
// how to use
<a href="http://www.opensourcehunter.com" rel="external">open link</a>
4、判断浏览器类型
注意： jQuery 1.4中$.support 来代替以前的$.browser
$(document).ready(function() {
// Target Firefox 2 and above
if ($.browser.mozilla && $.browser.version >= "1.8" ){
// do something
}
// Target Safari
if( $.browser.safari ){
// do something
}
// Target Chrome
if( $.browser.chrome){
// do something
}
// Target Camino
if( $.browser.camino){
// do something
}
// Target Opera
if( $.browser.opera){
// do something
}
// Target IE6 and below
if ($.browser.msie && $.browser.version <= 6 ){
// do something
}
// Target anything above IE6
if ($.browser.msie && $.browser.version > 6){
// do something
}
});
5、预加载图片
$(document).ready(function() {
jQuery.preloadImages = function()
{
for(var i = 0; i<arguments.length; i++)="" {="" jquery("=""><img>").attr("src", arguments[i]);
}
}
// how to use
$.preloadImages("image1.jpg");
});
</arguments.length;>
6、轻松切换css样式
$(document).ready(function() {
$("a.Styleswitcher").click(function() {
//swicth the LINK REL attribute with the value in A REL attribute
$('link[rel=stylesheet]').attr('href' , $(this).attr('rel'));
});
// how to use
// place this in your header
<link rel="stylesheet" href="default.css" type="text/css">
// the links
<a href="#" class="Styleswitcher" rel="default.css">Default Theme</a>
<a href="#" class="Styleswitcher" rel="red.css">Red Theme</a>
<a href="#" class="Styleswitcher" rel="blue.css">Blue Theme</a>
});
7、高度相等的列
如果您使用两个CSS列，以此来作为他们完全一样的高度
$(document).ready(function() {
function equalHeight(group) {
tallest = 0;
group.each(function() {
thisHeight = $(this).height();
if(thisHeight > tallest) {
tallest = thisHeight;
}
});
group.height(tallest);
}
// how to use
$(document).ready(function() {
equalHeight($(".left"));
equalHeight($(".right"));
});
});
8、简单字体变大缩小
$(document).ready(function() {
// Reset the font size(back to default)
var originalFontSize = $('html').css('font-size');
$(".resetFont").click(function(){
$('html').css('font-size', originalFontSize);
});
// Increase the font size(bigger font0
$(".increaseFont").click(function(){
var currentFontSize = $('html').css('font-size');
var currentFontSizeNum = parseFloat(currentFontSize, 10);
var newFontSize = currentFontSizeNum*1.2;
$('html').css('font-size', newFontSize);
return false;
});
// Decrease the font size(smaller font)
$(".decreaseFont").click(function(){
var currentFontSize = $('html').css('font-size');
var currentFontSizeNum = parseFloat(currentFontSize, 10);
var newFontSize = currentFontSizeNum*0.8;
$('html').css('font-size', newFontSize);
return false;
});
});
9、返回头部滑动动画
$('a[href*=#]').click(function() {
if (location.pathname.replace(/^\//,'') ==this.pathname.replace(/^\//,'')
&& location.hostname == this.hostname) {
var $target = $(this.hash);
$target = $target.length && $target
|| $('[name=' + this.hash.slice(1) +']');
if ($target.length) {
var targetOffset = $target.offset().top;
$('html,body')
.animate({scrollTop: targetOffset}, 900);
return false;
}
}
});
// how to use
// place this where you want to scroll to
<a name="top"></a>
// the link
<a href="#top">go to top</a>
10、获取鼠标位置
$().mousemove(function(e){
//display the x and y axis values inside the div with the id XY
$('#XY').html("X Axis : " + e.pageX + " | Y Axis " + e.pageY);
});
11、判断一个元素是否为空
if ($('#id').html()) {
// do something
}
12、替换元素
$('#id').replaceWith('
<div>I have been replaced</div>
');
13、jquery timer 返回函数
$(document).ready(function() {
window.setTimeout(function() {
// do something
}, 1000);
});
14、jquery也玩替换
$(document).ready(function() {
var el = $('#id');
el.html(el.html().replace(/word/ig, ""));
});
15、判断元素是否存在
$(document).ready(function() {
if ($('#id').length) {
// do something
}
});
16、让div也可以click
$("div").click(function(){
//get the url from href attribute and launch the url
window.location=$(this).find("a").attr("href"); return false;
});
// how to use
<div><a href="index.html">home</a></div>
17、使用jquery来判断浏览器大小添加不同的class
$(document).ready(function() {
function checkWindowSize() {
if ( $(window).width() > 1200 ) {
$('body').addClass('large');
}
else {
$('body').removeClass('large');
}
}
$(window).resize(checkWindowSize);
});
18、几个字符就clone！
var cloned = $('#id').clone()
19、设置div在屏幕中央
$(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();
});
20、创建自己的选择器
$(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');
});
});
21、计算元素的数目
$(document).ready(function() {
$("p").size();
});
22、设置自己的li样式
$(document).ready(function() {
$("ul").addClass("Replaced");
$("ul > li").prepend("‒ ");
// how to use
ul.Replaced { list-style : none; }
});
23、使用google的主机来加载jquery库
<script src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("jquery", "1.2.6");
google.setOnLoadCallback(function() {
// do something
});
</script><script src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js" type="text/javascript"></script>
// Example 2:(the best and fastest way)
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></script>
24、关闭jquery动画效果
$(document).ready(function() {
jQuery.fx.off = true;
});
25、使用自己的jquery标识
$(document).ready(function() {
var $jq = jQuery.noConflict();
$jq('#id').show();
});