js日期格式化

 form1.txtstime.value=stime;
       
        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 today = new Date();
        form1.txtendtime.value=today.format('yyyy-M-dd');