// PHP-compatible urlencode() for Javascript
 function urlencode(s) {
  s = encodeURIComponent(s);
  s = s.replace(/~/g,'%7E'); // change ~
  s = s.replace(/%20/g,'+')  // change space
	return s;
 }

 function SwapField(field) {
   a = document.getElementById(field).value;
   b = document.getElementById(field+'-new').innerHTML;

   if (a=='') a = 'leeg';
   if (b=='leeg') b = '';

   document.getElementById(field).value = b;
   document.getElementById(field+'-new').innerHTML = a;
 }

 function SwapCheckBox(field) {
  a = document.getElementById(field).checked;
   document.getElementById(field).checked = document.getElementById(field+'-new').checked;
   document.getElementById(field+'-new').checked = a;
   }

 function SwapValue(field) {
   a = $(field).value;
   b = $(field+'-new').value;

   if (a=='') a = 'leeg';
   if (b=='leeg') b = '';
   $(field).value = b;
   $(field+'-new').value = a;
 }

 function SwapInnerHTML(field) {
   a = document.getElementById(field).innerHTML;
   b = document.getElementById(field+'-new').innerHTML;

   if (a=='') a = 'leeg';
   if (b=='leeg') b = '';

   document.getElementById(field).innerHTML = b;
   document.getElementById(field+'-new').innerHTML = a;
 }