function ValidateTextBox(txt)
{
    if (txt.value == "") {
        txt.focus();
        return false;
    }
    return true;

}

function validateEmails(txt)
{
    var filter = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
    return filter.test(email);
}