JS获取当前日期及计算两日期差

比较的是yyyy-MM-dd这种格式,注：一般情况下，当前时间应该获取的是服务器时间，再传至前台

function curDateTime(){

var d = new Date(); 
var year = d.getFullYear(); 
var month = d.getMonth()+1; 
var date = d.getDate(); 
var curDateTime= year;
if(month>9)
curDateTime = curDateTime +"-"+month;
else
curDateTime = curDateTime +"-0"+month;
if(date>9)
curDateTime = curDateTime +"-"+date;
else
curDateTime = curDateTime +"-0"+date;
return curDateTime; 
}

function daysBetween(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 ('-'));

   var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);   
   return Math.abs(cha); 
}
//date:应还日期，curDateTime()：当前日期
if(daysBetween(date,curDateTime()) >= 0){
al
4000
ert("还未到还款日期，请到还款日期再来还款！");
return false;
}