function CheckLogin()
{
    if ($get("ctl00_txtUserName").value == "")
    {
        alert("Email can not be empty!");
        return false;
    }
    if ($get("ctl00_txtUserName").value == "Email Address")
    {
        alert("Email can not be empty!");
        return false;
    }
    if (document.getElementById("ctl00_txtUserName").value.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1)
    {
        alert("Email format is incorrect!");
        return false;
    }
    if ($get("ctl00_txtPassword").value == "")
    {
        alert("Password can not be empty!");
        return false;
    }
    if ($get("ctl00_txtPassword").value.length < 6)
    {
        alert("Password less than the median!");
        return false;
    }
}