How to add email validation using javascript

Issue

im am a newbie to javascript, i write a code to add a validation to my form, this is my script:

function validateForm()
{
    var name=document.forms["form"]["entry.1017659850"].value;
    var email=document.forms["form"]["entry.808043133"].value;
    var check=document.forms["form"]["entry.317648050"].checked;

    if(name == ""){
        document.getElementById("alertname").style.display="block";
        return false;
    }

    if(email == ""){
        document.getElementById("alertemail").style.display="block";
        return false;
    }

    if(!check){
        document.getElementById("alertcheck").style.display="block";
        return false;
    }

    return true;
}

And i want to add my email validation

function validateEmail(email) {
    var re = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
}

The question is how will i do it, i am not familiar with the functions on javascript.

Thank you.

Solution

Try this:

function validateEmail(email) {
    var re = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
}

function validateForm()
{
    var name=document.forms["form"]["entry.1017659850"].value;
    var email=document.forms["form"]["entry.808043133"].value;
    var check=document.forms["form"]["entry.317648050"].checked;

    if(name == ""){
        document.getElementById("alertname").style.display="block";
        return false;
    }

    if(email == ""){
        document.getElementById("alertemail").style.display="block";
        return false;
    }

    if(!check){
        document.getElementById("alertcheck").style.display="block";
        return false;
    }

    if(!validateEmail(email)){
        document.getElementById("alertemail").style.display="block";
        return false;
    }

    return true;
}

Answered By - Alveoli