function validate() {

            document.getElementById("email").addEventListener("keypress",errChecker)
            function errChecker() {
                let mail = document.getElementById("email").value
                let test = mail.match(/^[a-z]+[@][a-z]+[.][a-z]+$/)
                if (test == null) {
                    document.getElementById("email").setAttribute("class", "error")
                } else {
                    document.getElementById("email").removeAttribute("class")
                }
            }
        }



function validate() {
            setInterval(errChecker, 1000)

            function errChecker() {
                let mail = document.getElementById("email").value
                let test = mail.match(/^[a-z]+[@][a-z]+[.][a-z]+$/)
                if (test == null) {
                    document.getElementById("email").setAttribute("class", "error")
                } else {
                    document.getElementById("email").removeAttribute("class", "error")
                }
            }
        }