function echeck(str) {

        var at = "@"
        var dot = "."
        var lat = str.indexOf(at)
        var lstr = str.length
        var ldot = str.indexOf(dot)
        if (str.indexOf(at) == -1) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(at) == -1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(dot) == -1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(at, (lat + 1)) != -1) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(dot, (lat + 2)) == -1) {
            alert("Invalid E-mail ID")
            return false
        }

        if (str.indexOf(" ") != -1) {
            alert("Invalid E-mail ID")
            return false
        }

        return true
    }

    function ValidateForm() {
        var email = document.signup.email

        if ((email.value == null) || (email.value == "")) {
            alert("Please Enter your Email ID")
            email.focus()
            return false
        }
        if (echeck(email.value) == false) {
            email.value = ""
            email.focus()
            return false
        }
        return true

    }