Something easy for most people but not me I go crazy with it html and java

1

<!doctype html>

<h1>Spiritueux Wines and Liquors</h1>

<script>

    function validateEmail(){

        if (email_user().indexOf('@') == -1);

            alert("The email its valid .");

    }

    

    function email_user(){

        var text = prompt   ("What is your email?");

        return text;

    }

</script>
thats my code I need to validate my email when I run the function no matter What I type It will come the email is invalid its my third day learning java How do I do 2 functions to validate email with @ sign and if there is not @ sign present the output has say the email is invalid please edit my mistakes so I can see how its supposed to be and explain me why . Thank you for your help in advance
2

First you need to call validateEmail() function to execute the code inside the function and complete your if statement by using the following code :

<script>
    function validateEmail(){
        if (email_user().indexOf('@') == -1){
			alert("the email is invalid .");
		}
		else{
			alert("The email is valid .");
		}
    }
    function email_user(){
        var text = prompt   ("What is your email?");
        return text;
    }
	validateEmail()
</script>