在JS中如何比较两个时间字符串的大小

function CompareDate(d1,d2){
 //将所有的短横线替换为斜杠
  return ((new Date(d1.replace(/-/g,"/"))) > (new Date(d2.replace(/-/g,"/"))));
}

var current_time = "2007-2-2 7:30";
var stop_time = "2007-1-31 8:30";
alert(CompareDate(current_time,stop_time));