this javascript does not work in firefox why?

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C#

var startDate=document.getElementById("<%= txtStartDate.ClientID %>").value ;
       var endDate= document.getElementById("<%= txtEndDate.ClientID %>").value;
         var str = Date.parse(startDate).toString();
         var str1 = Date.parse(endDate).toString();

        if (str >= str1) {
            alert("End Date must be greater than Start Date");
            document.getElementById("<%= txtEndDate.ClientID %>").focus();
            return false;
        }

My Date Format is : dd-MMM-yyyy i.e. 9-Jul-2014

Posted 16-Jul-14 0:02am

Neha Mukesh

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Comments

ashok rathod 16-Jul-14 6:20am

what exactly is not working can u tell us ?

Neha Mukesh 16-Jul-14 6:48am

mozilla firefox does not show alert
I think Date.parse is not working in Mozilla

Kornfeld Eliyahu Peter 16-Jul-14 7:12am

Read here - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse

agent_kruger 16-Jul-14 8:50am

is it working in other browsers?

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SRS(The Coder) · Answer 1 · 2014-07-16T01:56:00

Date.parse can recognize only specific formats for specific browsers, and also we don't have the option for mention the input format anywhere using this method.
In that case it thinks that the input is in the format mm/dd/yyyy, so the result is wrong.

To fix the issue we need either to parse the input manually by splitting each part and then construct a Date object or we may use some already exisitng library which will take care of this like date.js/moment.js etc.

Example for manual parsing:

JavaScript

var inputDate = $('#' + controlName).val();
var parts = inputDate.split("-");
var d = new Date(Number(parts[2]), Number(parts[1]) - 1, Number(parts[0]));

Example using date.js: