JQuery 学习笔记2
jQuery小技巧
1.禁止右键点击
$(document).ready(function(){
$(document).bind("contextmenu",function(e){
return false;
});
});
2.在新窗口中打开链接
$(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>
3.检测浏览器
$(document).ready(function() {
// Target Firefox 2 and above
if ($.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
}
});
4.页面样式切换
$(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 href="default.css" type=text/css rel=stylesheet>
// the links
<A class=Styleswitcher href="#" rel=default.css>Default Theme</A>
<A class=Styleswitcher href="#" rel=red.css>Red Theme</A>
<A class=Styleswitcher href="#" rel=blue.css>Blue Theme</A>
});
5.返回页面顶部功能
$(document).ready(function() {
$('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>
});
6.获得鼠标指针XY值
$(document).ready(function() {
$().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);
});
// how to use
<DIV id=XY></DIV>
});
7.验证元素是否为空
$(document).ready(function() {
if ($('#id').html()) {
// do something
}
});
8.替换元素
$(document).ready(function() {
$('#id').replaceWith('
<DIV>I have been replaced</DIV>
);
});
9.延时加载功能
$(document).ready(function() {
window.setTimeout(function() {
// do something
}, 1000);
});
10.移除单词功能
$(document).ready(function() {
var el = $('#id');
el.html(el.html().replace(/word/ig, ""));
});
11.克隆对象
$(document).ready(function() {
var cloned = $('#id').clone();
// how to use
<DIV idid=id></DIV>
});
12.统计元素个数
$(document).ready(function() {
$("p").size();
});
13.禁用jQuery（动画）效果
$(document).ready(function() {
jQuery.fx.off = true;
});