function showhide(sel) {
    sel.form.verkeer.style.display = "none";
    sel.form.wonen.style.display = "none";
    sel.form.gezin.style.display = "none";
    sel.form.recreatie.style.display = "none";

  if (sel.options[sel.selectedIndex].value == "kies")
    {sel.form.verkeer.style.display = "none";}
  if (sel.options[sel.selectedIndex].value == "verkeer")
    {sel.form.verkeer.style.display = "block";}
  if (sel.options[sel.selectedIndex].value == "wonen")
    {sel.form.wonen.style.display = "block";}
  if (sel.options[sel.selectedIndex].value == "gezin")
    {sel.form.gezin.style.display = "block";}
  if (sel.options[sel.selectedIndex].value == "recreatie")
    {sel.form.recreatie.style.display = "block";}
}
function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

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_jumpMenuGo(selName,targ,restore){ //v3.0
  var selObj = MM_findObj(selName); if (selObj) MM_jumpMenu(targ,selObj,restore);
}
/**/
function showDiv( _divId ) {
	var thisDiv = document.getElementById( _divId );
		thisDiv.style.display = "block";
	}
function showDiv2( _divId ) {
	var thisDiv = document.getElementById( _divId );
	if ( thisDiv.style.display == "none") {
		thisDiv.style.display = "block";
		}
	else {
		hideDiv( _divId);
		}
	}
function hideDiv( _divId) {
	var thisDiv = document.getElementById( _divId );
	thisDiv.style.display = "none";
	}