montre(false);
function montre(para) {
if(para == false)
{
    for (var i = 1; i<=10; i++) 
    {
      if (document.getElementById('smenu'+i))
      {
       document.getElementById('smenu'+i).style.display='none';
      }
    }
    var menu_to_open = GetCookie('openmenu');
    if(document.getElementById(menu_to_open))
    {
     document.getElementById(menu_to_open).style.display='block';
    }
}else{
      var d = document.getElementById(para);
      for (var i = 1; i<=10; i++) 
      {
          if (document.getElementById('smenu'+i))
          {
             document.getElementById('smenu'+i).style.display='none';
          }
      }
      if(para != false)
      {
              SetCookie('openmenu',para);
      }else{
         var menu_to_open = GetCookie('openmenu');
         if(document.getElementById(menu_to_open))
         {
             document.getElementById(menu_to_open).style.display='block';
         }
      }
      if (d)
      {
  	d.style.display='block';
      }
      }
}

function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
      return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break; 
  }
  return null;
}

function SetCookie (name,value,expires,path,domain,secure) {
  document.cookie = name + "=" + escape (value) +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
}

//formulier

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' is geen geldig e-mailadres.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is niet ingevuld.\n'; }
  } if (errors) alert('Dit formulier bevat de volgende fout(en):\n'+errors);
  document.MM_returnValue = (errors == '');
}