//"Accept terms" form submission- By Dynamic Drive
//For full source code and more DHTML scripts, visit http://www.dynamicdrive.com
//This credit MUST stay intact for use

var checkobj

function agreesubmit(el){
checkobj=el
if (document.all||document.getElementById){
for (i=0;i<checkobj.form.length;i++){  //hunt down submit button
var tempobj=checkobj.form.elements[i]
if(tempobj.type.toLowerCase()=="submit")
tempobj.disabled=!checkobj.checked
}
}
}

function defaultagree(el){
if (!document.all&&!document.getElementById){
if (window.checkobj&&checkobj.checked)
return true
else{
alert("Please read/accept terms to submit form")
return false
}
}
}

// forms voor boekingen worden dubbel verstuurd: email en database zonder dat aanpassingen in forms nodig zijn
// in NLboeken/NLboeken_nl.php etc. is de verzendbutton aangepast met de dual_submit() functie
// ook NLinschrijvingsformulier is aangepast
function dual_submit(){
   var f = document.forms[0];
   f.setAttribute('target','_dsft');
   // _dsft = dualsubmit-fake-target-no-iframe-needed
   f.setAttribute('action', '../cgi-bin/mail.cgi');
   f.submit();

   f.setAttribute('target','_self');
   f.setAttribute('action','NL000_formulier_bu_dbase_write.php');
   f.submit();
}