JS日期格式化获取当前时间与当月的第一天与最后一天

做开发的时候，有时候JS与Java和Oracle的日期格式不匹配，js生成的日期月份前不带0。这时候需要使JS的日期与Oracle的Date一样才能保证数据的一致。

JS日期格式:

	Date.prototype.format = function(fmt) { 
	    var o = { 
	       "M+" : this.getMonth()+1,                 // 月份
	       "d+" : this.getDate(),                    // 日
	       "h+" : this.getHours(),                   // 小时
	       "m+" : this.getMinutes(),                 // 分
	       "s+" : this.getSeconds(),                 // 秒
	       "q+" : Math.floor((this.getMonth()+3)/3), // 季度
	       "S"  : this.getMilliseconds()             // 毫秒
	   }; 
	   if(/(y+)/.test(fmt)) {
	           fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); 
	   }
	    for(var k in o) {
	       if(new RegExp("("+ k +")").test(fmt)){
	            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));
	        }
	    }
	   return fmt; 
	}  

	var time = new Date().format("yyyy-MM-dd hh:mm:ss");

	$("#trbrqs").val(time);

	$('#trbrqs').attr("readonly","readonly");

Js获取当前日期

<script type="text/javascript">
	var date=new Date();
	document.write(date.getTime()+"<br/>");
	document.write(date.getFullYear()+"<br/>");
	document.write((date.getMonth()+1)+"<br/>");
	document.write(date.getDate()+"<br/>");
	var today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日";
	document.write(today+"<br/>");
	document.write(date.getHours()+"<br/>");
	document.write(date.getMinutes()+"<br/>");
	document.write(date.getSeconds()+"<br/>");
	today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日  "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds();
	document.write(today+"<br/>");
	var day=date.getDay();
	var week;
	switch(day){
	case 0:week="星期日";break;
	case 1:week="星期一";break;
	case 2:week="星期二";break;
	case 3:week="星期三";break;
	case 4:week="星期四";break;
	case 5:week="星期五";break;
	case 6:week="星期六";break;
	}
	document.write(week+"<br/>");
	today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日  "+week+" "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds();
	document.write(today+"<br/>");
</script>

js获取当月第一天与最后一天

$(function() {
     var nowdays = new Date();  
     var year = nowdays.getFullYear();
     var month = nowdays.getMonth()+1;
     if(month==0)
     {
         month=12;
         year=year-1;
     }
     if (month < 10) {
         month = "0" + month;
     }
     
     var firstDay = year + "-" + month + "-" + "01";
     var myDate = new Date(year, month, 0);
     var lastDay = year + "-" + month + "-" + myDate.getDate();
 
     var start = $("#ks").val(firstDay)
     var end = $("#js").val(lastDay);

  ));