java script comparison for date; always showing message as current date is an earlier date

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hi,

while selecting current date ,showing the message as You cannot select a day earlier than today.

function checkDate(sender, args) { 
        if (sender._selectedDate) < new Date()) {               
            alert("You cannot select a day earlier than today!");
            sender._selectedDate = new Date();               
            sender._textbox.set_Value(sender._selectedDate.format(sender._format))
        }
    }

Comparison is not working properly.
please help me..
Thanks in advance

Vini

Posted 23-Sep-14 1:41am

Vineetha Ravindranath

Updated 23-Sep-14 2:09am

sankarsan parida

v2

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Comments

Richard MacCutchan 23-Sep-14 8:02am

What is the value of _selectedDate, and what is returned from new Date()?

[no name] 23-Sep-14 8:10am

have you tested with selected date should advance from today

Sinisa Hajnal 23-Sep-14 8:14am

New Date returns date AND TIME component it is essentially DateTime.Now() from .NET

Your _selectedDate probably holds date without time (with zeroes) and the comparison is correct. Either use one of date libraries (moment.js for example) which makes this easier or set New Date into variable and then remove time component before the comparison.

Kornfeld Eliyahu Peter 23-Sep-14 8:18am

What type sender._selectedDate has?

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Manikandan MAC · Answer 1 · 2014-09-23T02:45:00

Solution 1

Hi,

please try this

JavaScript

var selectedDate = new Date(sender._selectedDate);
if (selectedDate  < new Date()) {

instead of this

JavaScript

if (sender._selectedDate) < new Date()) {

and update

Posted 23-Sep-14 2:45am

Manikandan MAC