js回调函数和函数带参数的使用示例

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//demo1<html><head><meta charset="UTF-8"><script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script></head><body><button type="button">Hide</button><p>This is a paragraph with little content.</p><button onclick="myFunction('Bill Gates','CEO')">点击这里</button><!--此时参数name 为'Bill Gates ,job为CEO ,--><script>$("button").click(function() { //回调函数$("p").hide(1000, function() {alert("The paragraph is now hidden");}); //会先隐藏然后执行回调函数});function myFunction(name, job) //此时参数name 和job为空 ,  {alert("Welcome " + name + ", the " + job);}</script></body></html>//demo2<!DOCTYPE html><html><head><meta charset="utf-8" /><title>回调函数</title></head><body><script type="text/javascript">function a(callback){callback()console.log('我是函数a')}function b(){ setTimeout("console.log('我是回调函数b')", 1000);//模仿耗时操作  }a(b);</script></body></html>

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