js 判断所选时间(或者当前时间)是否在某一时间段的实现代码

var time_range = function (beginTime, endTime, nowTime) { ???var strb = beginTime.split (":"); ???if (strb.length != 2) { ???????return false; ???} ???var stre = endTime.split (":"); ???if (stre.length != 2) { ???????return false; ???} ???var strn = nowTime.split (":"); ???if (stre.length != 2) { ???????return false; ???} ???var b = new Date (); ???var e = new Date (); ???var n = new Date (); ???b.setHours (strb[0]); ???b.setMinutes (strb[1]); ???e.setHours (stre[0]); ???e.setMinutes (stre[1]); ???n.setHours (strn[0]); ???n.setMinutes (strn[1]); ???if (n.getTime () - b.getTime () > 0 && n.getTime () - e.getTime () < 0) { ???????return true; ???} else { ???????alert ("当前时间是：" + n.getHours () + ":" + n.getMinutes () + "，不在该时间范围内！"); ???????return false; ???}}time_range ("21:30", "23:30", "3:22");