function checkifempty()
{
if (document.MonkeyForm.Meddelande.value=='' || document.MonkeyForm.subject.value=='')
document.MonkeyForm.Skicka.disabled=true
else if (document.MonkeyForm.realname.value=='' || document.MonkeyForm.email.value=='')
document.MonkeyForm.Skicka.disabled=true
else 
document.MonkeyForm.Skicka.disabled=false
}

if (document.all || document.getElementById)
setInterval("checkifempty()",100)