function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function reset_form(page){
	if(page=='Terug_naam'){
		if(document.getElementById('Terug_naam').value=='Naam'){
			document.getElementById('Terug_naam').value = '';
		}
	}
	if(page=='Terug_telefoonnummer'){
		if(document.getElementById('Terug_telefoonnummer').value=='Telefoonnummer'){
			document.getElementById('Terug_telefoonnummer').value = '';
		}
	}
	if(page=='Terug_Bedrijfsnaam'){
		if(document.getElementById('Terug_Bedrijfsnaam').value=='Bedrijfsnaam'){
			document.getElementById('Terug_Bedrijfsnaam').value = '';
		}
	}
	if(page=='Terug_Website'){
		if(document.getElementById('Terug_Website').value=='Website'){
			document.getElementById('Terug_Website').value = '';
		}
	}
	if(page=='zoeken'){
		if(document.getElementById('zoekterm').value=='Zoekterm'){
			document.getElementById('zoekterm').value = '';
		}
	}
}
function reset_form_new(myfield){
	var val = document.getElementById(myfield).value;
	if(val=='Naam' || val=='Telefoonnummer' || val=='Email adres')
		document.getElementById(myfield).value='';
}

// Add remove TR

function doAddTr(arrTds, tblName){
	var tbl = document.getElementById(tblName);
	if(arrTds.length >= 1 && tbl){
		var tr = document.createElement('tr');
		for(var i = 0; i < arrTds.length; i++){
			var td = document.createElement('td');
			td.innerHTML = arrTds[i];
			tr.appendChild(td);
		}
		tbl.appendChild(tr);
	}
}

function clearExisting(tblName, rows_to_delete){
	var objTbl = document.getElementById(tblName);
	if(objTbl.childNodes.length >= 1){
		var cnter = 1;
		for(var j = objTbl.childNodes.length; j >= 0; j--){
			if(objTbl.childNodes[j] && objTbl.childNodes[j].tagName.toUpperCase() == 'TR'){
				objTbl.removeChild(objTbl.childNodes[j]);
				if(cnter == rows_to_delete)
					break;
				cnter++;
			}
		}
	}
}
// Add new size row
function AddNew(antal_person, frm){
	var td1 = '<select name="deelnemer_geslacht[]" id="deelnemer_geslacht" ><option value="Dhr">Dhr</option><option value="Mevr">Mevr</option></select>';
	var td2 = '<input type="text" name="deelnemer_voornaam[]" id="deelnemer_voornaam" />';
	var td3 = '<input type="text" name="deelnemer_tussenvoegsel[]" id="deelnemer_tussenvoegsel" />';
	var td4 = '<input type="text" name="deelnemer_achternaam[]" id="deelnemer_achternaam" />' + "\n";
	
	if(antal_person > parseInt(frm.antal_person_old.value)){
		var rows_to_create = (antal_person - parseInt(frm.antal_person_old.value));
	}
	else if(antal_person < parseInt(frm.antal_person_old.value)){
		var rows_to_delete = (parseInt(frm.antal_person_old.value) - antal_person);
		clearExisting('tblData', rows_to_delete);
	}
	else{
		var rows_to_create = antal_person;
	}

	for(var i = 0; i < rows_to_create; i++){
		var arrTds = new Array(td1, td2, td3, td4);
		doAddTr(arrTds, 'tblData');
	}
	frm.antal_person_old.value = antal_person;
}

// End of Add Remove TR