js中格式化日期时间型数据函数代码

var newDt=new Date(dt.replace("-","/"));

Date.prototype.format = function(format){ 
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; 
};

var fmtDt=newDt.format("yyyy-MM-dd");

var fmtDt=Convert.ToDateTime(dt).ToString("yyyy-MM-dd");