参考网上的一个资料，做下备注。
<html><head><title>js event demo</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0" max-age="0"></head><body><h4>js event demo</h4></body><script type="text/javascript">//自定义事件function EventEmitter() {this.events = {};} //绑定事件函数EventEmitter.prototype.on = function(ename, call){this.events[ename] = this.events[ename] || [];this.events[ename].push(call);}EventEmitter.prototype.emit = function(ename, _){var events = this.events[ename];//取参数，剔除参数enamevar args = Array.prototype.slice.call(arguments, 1);for(var i = 0; i < events.length; i++){//调用绑定的事件函数events[i].apply(null, args);}}function app(){calltime = 0;//同一个事件绑定了两个处理函数this.on('start',function(user, date){calltime += 1;console.log('event start: ' + user + " " + date + " " + calltime);});this.on('start', function(user, date){calltime += 1;console.log('event start: ' + user + " " + date + " " + calltime);})}app.prototype = new EventEmitter();var a = new app();//触发事件a.emit('start', 'fred', new Date());</script></html>
要优于atoi()函数---C语言)
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