Question

JavaScript怎样判断两个日期字符串的大小

Answer 1

function compareDate(DateOne,DateTwo)
{

var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ("-"));
var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ("-")+1);
var OneYear = DateOne.substring(0,DateOne.indexOf ("-"));

var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ("-"));
var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ("-")+1);
var TwoYear = DateTwo.substring(0,DateTwo.indexOf ("-"));

if (Date.parse(OneMonth+"/"+OneDay+"/"+OneYear) >
Date.parse(TwoMonth+"/"+TwoDay+"/"+TwoYear))
{
return true;
}
else
{
return false;
}

}
function compareDate(DateOne,DateTwo)
{

var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ("-"));
var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ("-")+1);
var OneYear = DateOne.substring(0,DateOne.indexOf ("-"));

var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ("-"));
var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ("-")+1);
var TwoYear = DateTwo.substring(0,DateTwo.indexOf ("-"));

if (Date.parse(OneMonth+"/"+OneDay+"/"+OneYear) >
Date.parse(TwoMonth+"/"+TwoDay+"/"+TwoYear))
{
return true;
}
else
{
return false;
}

}

举例：
alert(compareDate(''2010-12-01'',''2009-05-02'''));

Answer 2

date1=new Date('12-11-2000');
date2=new Date('12-12-2000');
alert("日期差值为:"+(date2-date1));

或者

date1.getTime() - date2.getTime();