var intervalID = null; // saves the interval, and makes it possible to clear it
var direction = 0; // controls scroll direction
var scrollspeed = 12; // px to move content per interval
var refreshinterval = 30; // ms refresh interval

function scrollup()
{
    direction = -scrollspeed;
    intervalID = setInterval("scrollincrement()", refreshinterval);
}
function scrolldown()
{
    direction = scrollspeed;
    intervalID = setInterval("scrollincrement()", refreshinterval);
}
function scrollincrement()
{
var scrollY = getScrollXY()[1];
window.scrollTo(getScrollXY()[0], scrollY += direction);
//    document.getElementById("maincontent").scrollTop += direction;
}
function scrollstop()
{
    direction = 0;
    clearInterval(intervalID);
}

function CorrectEmailaddress(SubscriberForm)
{
if (SubscriberForm.pf_SubscriberName.value.length < 2)
{
alert("Indtast dit \"navn og efternavn\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
 }
if (SubscriberForm.pf_Email.value.length > 255)
{
alert("Du kan maks. skrive 255 tegn i \"E-mail-adresse\" field.");
SubscriberForm.pf_Email.focus();
return (false);
 }
if (SubscriberForm.pf_Email.value == "")
{
alert("Angiv venligst værdien for \"E-mail-adresse\" field.");
SubscriberForm.pf_Email.focus();
return (false);
 }
if (SubscriberForm.pf_Email.value.length < 7)
{
alert("Skriv mindst 7 tegn i \"E-mail-adresse\"field.");
SubscriberForm.pf_Email.focus();
return (false);
}
pf_Email=SubscriberForm.pf_Email.value
at=pf_Email.indexOf("@");
lastat=pf_Email.lastIndexOf("@");
dot=pf_Email.lastIndexOf(".");
if(at<1||at!=lastat||dot<at){
alert("Din e-mail-adresse er ikke korrekt. Prøv igen.");
return false;
}
var val1 = SubscriberForm.pf_Email.value;
var val2 = SubscriberForm.Email.value;
if (val1 != val2)
{
 alert("Kontroller at e-mailadressen er skrevet rigtigt, og prøv igen");
SubscriberForm.pf_Email.focus();
return false;
}
if (SubscriberForm.pf_DemographicField6.value.length < 4)
{
alert("Angiv korrekt \"Adresse\".");
SubscriberForm.pf_DemographicField6.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField1.value.length < 4)
{
alert("Angiv korrekt \"Postnummer\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField3.value.length < 8)
{
alert("Indtast dit \"Telefonnummer. (uden mellemrum)\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField5.value.length < 3)
{
alert("Indtast din \"Bonuskode\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
}
}


function CorrectEmailaddressBonus(SubscriberForm)
{
if (SubscriberForm.pf_SubscriberName.value.length < 2)
{
alert("Indtast dit \"navn og efternavn\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
 }
if (SubscriberForm.pf_Email.value.length > 255)
{
alert("Du kan maks. skrive 255 tegn i \"E-mail-adresse\".");
SubscriberForm.pf_Email.focus();
return (false);
 }
if (SubscriberForm.pf_Email.value == "")
{
alert("Indtast din \"E-mail-adresse\".");
SubscriberForm.pf_Email.focus();
return (false);
 }
if (SubscriberForm.pf_Email.value.length < 7)
{
alert("Skriv mindst 7 tegn i \"E-mail-adresse\".");
SubscriberForm.pf_Email.focus();
return (false);
}
pf_Email=SubscriberForm.pf_Email.value
at=pf_Email.indexOf("@");
lastat=pf_Email.lastIndexOf("@");
dot=pf_Email.lastIndexOf(".");
if(at<1||at!=lastat||dot<at){
alert("Din e-mail-adresse er ikke korrekt. Prøv igen.");
return false;
}
var val1 = SubscriberForm.pf_Email.value;
var val2 = SubscriberForm.Email.value;
if (val1 != val2)
{
 alert("Kontroller at e-mailadressen er skrevet rigtigt, og prøv igen");
SubscriberForm.pf_Email.focus();
return false;
}
if (SubscriberForm.pf_DemographicField6.value.length < 4)
{
alert("Angiv korrekt \"Adresse\".");
SubscriberForm.pf_DemographicField6.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField1.value.length < 4)
{
alert("Angiv korrekt \"Postnummer\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField2.value.length < 2)
{
alert("Angiv korrekt \"By\".");
SubscriberForm.pf_DemographicField2.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField3.value.length < 8)
{
alert("Indtast dit \"Telefonnummer. (uden mellemrum)\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
}
if (SubscriberForm.pf_DemographicField5.value.length < 3)
{
alert("Indtast din \"Bonuskode\".");
SubscriberForm.pf_DemographicField1.focus();
return (false);
}
}