javascript 简练的几个函数

//日期类 
function myDate(time){ 
var d = new Date(time); 
this.y=d.getFullYear(); 
this.m=d.getMonth(); 
this.d=d.getDate(); 
this.h=d.getHours(); 
this.m=d.getMinutes(); 
this.s=d.getSeconds(); 
} 
//创建DOM 
function createDOM(e,p){ 
var el=document.createElement(e); 
if(!p) 
p=document.body; 
p.appendChild(el); 
return el; 
} 
//为dom添加事件监听 
function addEvent(el,event,fn){ 
el.addEventListener?el.addEventListener(event,fn,false):el.attachEvent("on"+event,fn); 
}