滚动图片切换连播(JavaScript特效 | JS特效源代码)

[翻译]High Performance JavaScript(033)

Summary 总结
When web pages or applications begin to feel slow, analyzing assets as they come over the wire and profiling scripts while they are running allows you to focus your optimization efforts where they are needed most.
当网页或应用程序变慢时，分� ......

JavaScript 读取 JSON

JSON:
[{"subjecttypeId":"1","subjectName":"67","scope":"1",},{"subjecttypeId":"1","subjectName":"345","scope":"1"}]
JavaScript:
var result = window.eval('(' + JSON+ ')');

for(var p in result){

result[p].subjectName;

alert(result[p] ......

href=“#”与href=“javascript:void(0)”区别

使用过ajax的都常见这样的代码：
<a href="javascript:doTest2();void(0);" mce_href="javascript:doTest2();void(0);">here</a>
但这儿的void(0)究竟是何含义呢？
Javascript中void是一个操作符，该操作符指定要计算一个表达式但是不返回值。
void 操作符用法格式如下：
1. jav ......

javascript写在函数里面

javascript写在函数里面
function loadscript(url) {
document.write('<scr' + 'ipt type="text/javascript" src"' + url + '"><\/scr' + 'ipt>'>)
}
在成功的正则表达式查找完成之前，其属性值为 undefined。
不要将全局 RegExp 对象与正则表达式
对象混淆。尽管听起来� ......