Date扩展

格式化

Date.prototype.format = function(format){
    /*
     * eg:format="yyyy-MM-dd hh:mm:ss";
     */
    var o = {
        "M+" :  this.getMonth()+1,  //month
        "d+" :  this.getDate(),     //day
        "h+" :  this.getHours(),    //hour
        "m+" :  this.getMinutes(),  //minute
        "s+" :  this.getSeconds(), //second
        "q+" :  Math.floor((this.getMonth()+3)/3),  //quarter
        "S"  :  this.getMilliseconds() //millisecond
    };
	   		  
    if(/(y+)/.test(format)) {
        format = format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
    }
	   		 
    for(var k in o) {
        if(new RegExp("("+ k +")").test(format)) {
            format = format.replace(RegExp.$1, RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
        }
    }
    return format;
};