How to compare 2 dates?

[chongming]

Hi i want to compare to dates and alert the user if he enters a date earlier than the current date. The user enters the date by using the javascript date time picker format is (yyyy-mm-dd).
These are the codes:

var dt = document.form1.txtDateFrm.value;
    var enddt=document.form1.txtDateTo.value;
    alert(dt)
 
    var thedate = new Date();
    var thisyear = thedate.getYear( );
    var thismonth = thedate.getMonth( ) + 1;
    var thisday = thedate.getDate( );
    var currentDate = thisyear+"-"+thismonth+"-"+thisday;
    alert(currentDate)
 
    if (new Date(dt) < new Date(currentDate))
    {
        alert("Date From cannot be earlier than the current date.")
    return false;
    }

I have tried using

var dt = new Date(document.form1.txtDateFrm.value);

but when i alert the var dt, it returns NaN.

The if statement is not working as well..

How should i solve this problem?
Thank you..

[shweta123]

Hi,

You can try this
Link

Hi i want to compare to dates and alert the user if he enters a date earlier than the current date. The user enters the date by using the javascript date time picker format is (yyyy-mm-dd).
These are the codes:

var dt = document.form1.txtDateFrm.value;
    var enddt=document.form1.txtDateTo.value;
    alert(dt)
 
    var thedate = new Date();
    var thisyear = thedate.getYear( );
    var thismonth = thedate.getMonth( ) + 1;
    var thisday = thedate.getDate( );
    var currentDate = thisyear+"-"+thismonth+"-"+thisday;
    alert(currentDate)
 
    if (new Date(dt) < new Date(currentDate))
    {
        alert("Date From cannot be earlier than the current date.")
    return false;
    }

I have tried using

var dt = new Date(document.form1.txtDateFrm.value);

but when i alert the var dt, it returns NaN.

The if statement is not working as well..

How should i solve this problem?
Thank you..

[vee10]

Hi ,

The following code can solve ur problem

var dt = document.form1.txtDateFrm.value;
    var enddt=Date.parse(document.form1.txtDateTo.value);
    alert(dt);
      var l_dt = new Date();
     var today = Date.UTC( l_dt.getFullYear(), l_dt.getMonth()+1, l_dt.getDate(),0,0,0);
     alert(today);
    thisyear=dt.substring(0,dt.indexOf("-"));
    dt=dt.substring(dt.indexOf("-")+1);  
    thismonth = dt.substring(0,dt.indexOf("-"));
    dt=dt.substring(dt.indexOf("-")+1);  
    var start = Date.UTC(thisyear,thismonth,dt,0,0,0);
    alert(start);
    if(start > today)
    {
        alert("Date From cannot be earlier than the current date.")
    return false;
    }
 

if any wrong in my code please inform me

Hi i want to compare to dates and alert the user if he enters a date earlier than the current date. The user enters the date by using the javascript date time picker format is (yyyy-mm-dd).
These are the codes:

var dt = document.form1.txtDateFrm.value;
    var enddt=document.form1.txtDateTo.value;
    alert(dt)
 
    var thedate = new Date();
    var thisyear = thedate.getYear( );
    var thismonth = thedate.getMonth( ) + 1;
    var thisday = thedate.getDate( );
    var currentDate = thisyear+"-"+thismonth+"-"+thisday;
    alert(currentDate)
 
    if (new Date(dt) < new Date(currentDate))
    {
        alert("Date From cannot be earlier than the current date.")
    return false;
    }

I have tried using

var dt = new Date(document.form1.txtDateFrm.value);

but when i alert the var dt, it returns NaN.

The if statement is not working as well..

How should i solve this problem?
Thank you..

[chongming]

Hi,
Thanks for your help.
It is working extremely well.

Thank you :)