Windows 10: when i was trying to execute javascript files on my system it is showing me below error

this is the error i was getting code is everything fine node js also installed on the system

:)

 

Javascript

Hello Guys,

I'm trying to restrict a JavaScript calendar. The calendar will be implemented into a booking system, but I don't want the users to be able to select the dates which land on Saturday and Sunday.

Anyone got any suggestions?

Thanks

 

JavaScript

Hey everyone, just getting started in JavaScript, and basically it is kicking my butt so far. It seems that the class is more for an intermediate learner than a beginner*Laugh :laugh:

None the less, I have this assignment due, and many of us students are completely in the dark here. LOL Anyhow, this is the question we must answer.

Write JavaScript code that anticipates and handles an error for an expected numeric field. This code is executed on keypress and the entered value is saved for you in a variable called enteredChar. Include the try block of JavaScript statements needed to check if the character is not a number or a non-alphanumeric character or if you throw an error message.

Any help would be much appreciated*Rockout :rockout:

 

How I can execute Javascript into Perl?

I don't know how I can execute an event of Javascript into a link in a program in Perl.
This event of JavaScript have executed a function that return a HTML page.
Anybody know how I can it?

Is it possible do it this?:
$datos=$datos.""<a>"";

What is bad in this code?

Thank you very much.