function change_site() {
var site = document.myform.mypopup.selectedIndex;
window.location.href = document.myform.mypopup.options[site].value;
}

function change_site2() {
var site2 = document.myform2.mypopup2.selectedIndex;
window.location.href = document.myform2.mypopup2.options[site2].value;
}

function validate()
{
x=document.formA
naam=x.naam.value
email=x.email.value
var verzendingOK="True"
if (naam=="")
{
alert("Naam is niet gevuld")
verzendingOK="False"
}
if (verzendingOK=="False")
   {
   return false
   }
}