js时间对比

<script language="javascript">

var starttime ="2010-06-29 22:00:00";
var endtime =  new Date();

   function comptime(starttime ,  endtime  ){

   var beginTimes=beginTime.substring(0,10).split('-'); 
       beginTimeTemp =beginTimes[1]+'-'+beginTimes[2]+'-'+beginTimes[0]+' '+beginTime.substring(10,19); 
 

   return (Date.parse(endtime)-Date.parse(beginTimeTemp))/3600/1000;
     }

if(comptime(starttime, endtime)>0 ){
alert("开始时间小于结束时间" );
}else if( comptime(starttime, endtime)<0){
alert("开始时间大于结束时间" );
}else{
alert("相等" );
}

  

</script>