再次小结若干个jquery的小技巧

1 使用load加载
可以使用load去加载外部文件

<!-- File name index.html -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/
libs/jquery/1.7.1/jquery.min.js"></script>
<title>Load external files with jQuery Demo</title>
<style type="text/css">
.load_files {
padding: 5px;
font-weight: bold;
background-color: #A9F5A9;
border: solid #333333 1px;
cursor: pointer;
}
/* 装载中的图片*/
.loading {
width: 20px;
height: 20px;
background-image: url('loader.gif');
display: none;
}

</style>
<script type="text/javascript">
$(function() {
$(".load_files").click(function() {
$(this).hide();
/*当点加载按钮时,显示加载的图案*/
$(".loading").show();
$(".loaded_files").load('external.html', function() {

//加载完毕隐藏加载图形 $(".loading").hide();
});
});
});

</script>
</head>
<body>
<h2>Load external files with jQuery</h2>
<button class="load_files">
Load Files
</button>
<div class="loading"></div>
<div class="loaded_files"></div>
</body>
</html>




2 让用户自由的改动字体


$(document).ready(function() {
//获得当前字体大小
var originalFontSize = $('html').css('font-size');


//增加字体大小
$(".increaseFont").click(function() {
var currentFontSize = $('html').css('font-size');
var currentFontSizeNumber = parseFloat(currentFontSize, 10);
//设置新的字体大小
var newFontSize = currentFontSizeNumber*1.2;
$('html').css('font-size', newFontSize);
return false;
});

//减少字体大小
$(".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;
});

//重新恢复字体大小
$(".resetFont").click(function(){
$('html').css('font-size', originalFontSize);
});
});



3 在新窗口中打开连接


$(document).ready(function() {

$("a[href^='http']").attr('target','_blank');
});



4 禁止右键


//check that the DOM is ready
$(document).ready(function() {
//catch the right-click context menu
$(document).bind("contextmenu",function(e) {
//warning prompt - optional
alert("No right-clicking!");

//cancel the default context menu
return false;
});
});



5 快速将用户从底部带到顶部


$(document).ready(function() {
//when the id="top" link is clicked
$('#top').click(function() {
//scoll the page back to the top
$(document).scrollTo(0,500);
}
});