function validLogin(requeststr)
{
    var valid   = true;
    var form    = document.frmLG;

    var fields = new Array("login", "wachtwoord");
    var fieldteksten = new Array("emailadres", "wachtwoord");
    for(var i =0; i<fields.length;i++)
    {
        if(form[fields[i]] && form[fields[i]].value == "" && valid)
        {
            alert("U dient uw "+fieldteksten[i].toUpperCase()+" in te vullen");
            form[fields[i]].focus();
            valid = false;
            break;
        }
    }


    AtPos   = form.login.value.indexOf("@");
    StopPos = form.login.value.lastIndexOf(".");
    if ((StopPos == -1 || StopPos < AtPos) && valid)
    {
        alert("U dient een juist emailadres in te vullen");
        form.login.focus();
        valid = false;
    }

    if(valid)
    {
        if(requeststr != "")
        {
            form.action = "/custom/login.php?requeststr="+requeststr;
        }
        else
        {
            form.action = "/custom/login.php";
        }
        form.method = "post";
        form.submit();
    }
}
function logout()
{
    document.location = "/custom/login.php?action=logout";
}

function submitenter(field,e){
   var keycode;
   if (window.event) keycode = window.event.keyCode;
   else if (e) keycode = e.which;
   else return true;

   if (keycode == 13){
      document.frmLG.submit();
      return false;
   }
   else
      return true;
}