function valid_text() {
    if (emptyField(document.getElementById("txtEmailAddress"))) {
        alert('Please Enter Email Id.');
        document.getElementById("txtEmailAddress").focus();
        document.getElementById("txtEmailAddress").select();
        return false;
    }
    if (!validEmailId(document.getElementById("txtEmailAddress").value)) {
        alert('Please Enter Valid Email Id.');
        document.getElementById("txtEmailAddress").focus();
        document.getElementById("txtEmailAddress").select();
        return false;
    }
}