用JS实现字符串转日期并比较大小的方法(有修改)

http://blog.sina.com.cn/s/blog_44749c5a0100b88r.html
方法一:

// checkStartDate和checkEndDate的格式为"2008-08-08"
function checkDate(checkStartDate, checkEndDate) {
	var arys1= new Array();
	var arys2= new Array();
	if(checkStartDate != null && checkEndDate != null) {
		arys1=checkStartDate.split('-');
		var sdate=new Date(arys1[0],parseInt(arys1[1]-1),arys1[2]);
		arys2=checkEndDate.split('-');
		var edate=new Date(arys2[0],parseInt(arys2[1]-1),arys2[2]);
		if(sdate > edate) {
			alert("日期开始时间大于结束时间");   
			return false;   
		}
		return true;
	}
}

方法二:

// DateOne和DateTwo的格式为"2008-08-08"
function compareDate(startDate,endDate) { 
	var startMonth = startDate.substring(5,startDate.lastIndexOf ("-"));
	var startDay = startDate.substring(startDate.length,startDate.lastIndexOf ("-")+1);
	var startYear = startDate.substring(0,startDate.indexOf ("-"));

	var endMonth = endDate.substring(5,endDate.lastIndexOf ("-"));
	var endDay = endDate.substring(endDate.length,endDate.lastIndexOf ("-")+1);
	var endYear = endDate.substring(0,endDate.indexOf ("-"));
	
	if (Date.parse(startMonth+"/"+startDay+"/"+startYear) >
		Date.parse(endMonth+"/"+endDay+"/"+endYear)) {
		return true;
	}
	return false;
}

alert(compareDate("2004-12-01","2004-05-02"));