结束时间与开始时间对比

网上搜到的，不过改了时间斜杠转横线

var beginTime = "2009-09-21 00:00:00";
var endTime = "2009-09-21 00:00:01";
var beginTimes = beginTime.replace(/\//g,"-");
var endTimes = endTime.replace(/\//g,"-");
beginTime = beginTimes[1] + '-' + beginTimes[2] + '-' + beginTimes[0] + ' ' + beginTime.substring(10, 19);
endTime = endTimes[1] + '-' + endTimes[2] + '-' + endTimes[0] + ' ' + endTime.substring(10, 19);
alert(beginTime + "aaa" + endTime);
alert(Date.parse(endTime));
alert(Date.parse(beginTime));
var a = (Date.parse(endTime) - Date.parse(beginTime)) / 3600 / 1000;
if (a < 0) {
alert("endTime小!");
} else if (a > 0) {
alert("endTime大!");
} else if (a == 0) {
alert("时间相等!");
} else {
return 'exception'
}