function cleartext2() {
    if (document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").value == "Enter Your Email ID") {
        document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").value = "";
    }
}

function check_email() {
    if (emptyField(document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs"))) {
        alert('Please enter Email');
        document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").focus();
        document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").select();
        return false;
    }
    if (!emptyField(document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs"))) {
        if (!validEmailId(document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").value)) {
            alert('Please enter valid Email Id');
            document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").focus();
            document.getElementById("_ctl0_ContentPlaceHolder1_txtJoineUs").select();
            return false;
        }
    }
}