A simple example of a JS date comparison size

2020-03-30 01:19:38
OfStack

1, compare the date size of the js code


<script>
var beginDate=$("#beginDate").val();  
 var endDate=$("#endDate").val();  
 var d1 = new Date(beginDate.replace(/-/g, "/"));  
 var d2 = new Date(endDate.replace(/-/g, "/"));  

  if(beginDate!=""&&endDate!=""&&d1 >=d2)  
 {  
  alert(" Start time must not be greater than end time! ");  
  return false;  
 }
 </script>

2. Js compares the time and date size


<html>   
<head>   
<title>calendar- Compare time and date sizes -www.jb51.net</title>   
<script type="text/javascript" src="CalendarFramework.js"></script>   
</head>   
<body>   
 Start time: <input onfocus="setday(this)" id="startTime" name="startTime"> to      
 End time: <input onfocus="setday(this)" id="endTime" name="endTime">   
          <input type="button" onclick="checkTime()" value=" check "/>   
          </body>   
<script type="text/javascript" >   
checkTime = function() {   
    var startTime = document.getElementById("startTime").value;   
    var endTime = document.getElementById("endTime").value;   
    compareCalendar(startTime, endTime);         
}   
//Compare day & noon;
function compareDate(checkStartDate, checkEndDate) {      
    var arys1= new Array();      
    var arys2= new Array();      
if(checkStartDate != null && checkEndDate != null) {      
    arys1=checkStartDate.split('-');      
      var sdate=new Date(arys1[0],parseInt(arys1[1]-1),arys1[2]);      
    arys2=checkEndDate.split('-');      
    var edate=new Date(arys2[0],parseInt(arys2[1]-1),arys2[2]);      
if(sdate > edate) {      
    alert(" Date start time is greater than end time ");         
    return false;         
}  else {   
    alert(" through ");   
    return true;      
    }   
    }      
}     

//Judge the date, the time & the size;
function compareTime(startDate, endDate) {   
 if (startDate.length > 0 && endDate.length > 0) {   
    var startDateTemp = startDate.split(" ");   
    var endDateTemp = endDate.split(" ");   

    var arrStartDate = startDateTemp[0].split("-");   
    var arrEndDate = endDateTemp[0].split("-");   

    var arrStartTime = startDateTemp[1].split(":");   
    var arrEndTime = endDateTemp[1].split(":");   

var allStartDate = new Date(arrStartDate[0], arrStartDate[1], arrStartDate[2], arrStartTime[0], arrStartTime[1], arrStartTime[2]);   
var allEndDate = new Date(arrEndDate[0], arrEndDate[1], arrEndDate[2], arrEndTime[0], arrEndTime[1], arrEndTime[2]);   

if (allStartDate.getTime() >= allEndDate.getTime()) {   
        alert("startTime Is not greater than endTime Cannot pass ");   
        return false;   
} else {   
    alert("startTime Less than endTime , so it passed ");   
    return true;   
       }   
} else {   
    alert(" Time cannot be empty ");   
    return false;   
      }   
}   
//Compare dates, time scales & NBSP;
function compareCalendar(startDate, endDate) {   
if (startDate.indexOf(" ") != -1 && endDate.indexOf(" ") != -1 ) {   
    //Includes time, date & NBSP;
        compareTime(startDate, endDate);               
} else {   
    //Contains no time, only date & NBSP;
    compareDate(startDate, endDate);   
      }   
}   
</script>   
</html>