        <!-- hide
        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_nbGroup(event, grpName) { //v6.0
        var i,img,nbArr,args=MM_nbGroup.arguments;
          if (event == "init" && args.length > 2) {
            if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
              img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
              if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
              nbArr[nbArr.length] = img;
              for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
                if (!img.MM_up) img.MM_up = img.src;
                img.src = img.MM_dn = args[i+1];
                nbArr[nbArr.length] = img;
            } }
          } else if (event == "over") {
            document.MM_nbOver = nbArr = new Array();
            for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
              if (!img.MM_up) img.MM_up = img.src;
              img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])?args[i+1] : img.MM_up);
              nbArr[nbArr.length] = img;
            }
          } else if (event == "out" ) {
            for (i=0; i < document.MM_nbOver.length; i++) { img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
          } else if (event == "down") {
            nbArr = document[grpName];
            if (nbArr) for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
            document[grpName] = nbArr = new Array();
            for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
              if (!img.MM_up) img.MM_up = img.src;
              img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
              nbArr[nbArr.length] = img;
          } }
        }
        
        // stop hiding -->

          <!-- hide 
          if (document.images) {
          tuinontwerp_f2 = new Image(118 ,23); tuinontwerp_f2.src = "images/tuinontwerp_f2.gif";
          tuinontwerp_f2 = new Image(118 ,23); tuinontwerp_f2.src = "images/tuinontwerp_f4.gif";
          tuinontwerp_f1 = new Image(118 ,23); tuinontwerp_f1.src = "images/tuinontwerp.gif";
          tuinontwerp_f3 = new Image(118 ,23); tuinontwerp_f3.src = "images/tuinontwerp_f3.gif";
          voorbeeldtuinen_f2 = new Image(118 ,23); voorbeeldtuinen_f2.src = "images/voorbeeldtuinen_f2.gif";
          voorbeeldtuinen_f2 = new Image(118 ,23); voorbeeldtuinen_f2.src = "images/voorbeeldtuinen_f4.gif";
          voorbeeldtuinen_f1 = new Image(118 ,23); voorbeeldtuinen_f1.src = "images/voorbeeldtuinen.gif";
          voorbeeldtuinen_f3 = new Image(118 ,23); voorbeeldtuinen_f3.src = "images/voorbeeldtuinen_f3.gif";
          buitenspel_f2 = new Image(118 ,23); buitenspel_f2.src = "images/buitenspel_f2.gif";
          buitenspel_f2 = new Image(118 ,23); buitenspel_f2.src = "images/buitenspel_f4.gif";
          buitenspel_f1 = new Image(118 ,23); buitenspel_f1.src = "images/buitenspel.gif";
          buitenspel_f3 = new Image(118 ,23); buitenspel_f3.src = "images/buitenspel_f3.gif";
          themas_f2 = new Image(118 ,23); themas_f2.src = "images/themas_f2.gif";
          themas_f2 = new Image(118 ,23); themas_f2.src = "images/themas_f4.gif";
          themas_f1 = new Image(118 ,23); themas_f1.src = "images/themas.gif";
          themas_f3 = new Image(118 ,23); themas_f3.src = "images/themas_f3.gif";
          beplanting_f2 = new Image(118 ,23); beplanting_f2.src = "images/beplanting_f2.gif";
          beplanting_f2 = new Image(118 ,23); beplanting_f2.src = "images/beplanting_f4.gif";
          beplanting_f1 = new Image(118 ,23); beplanting_f1.src = "images/beplanting.gif";
          beplanting_f3 = new Image(118 ,23); beplanting_f3.src = "images/beplanting_f3.gif";
          contact_f2 = new Image(118 ,23); contact_f2.src = "images/contact_f2.gif";
          contact_f2 = new Image(118 ,23); contact_f2.src = "images/contact_f4.gif";
          contact_f1 = new Image(118 ,23); contact_f1.src = "images/contact.gif";
          contact_f3 = new Image(118 ,23); contact_f3.src = "images/contact_f3.gif";
          }
          // stop hiding -->
          function checkReqFields(flds){
          lsFlds = flds.split(',');
          ret = true;
          for (i=0; i < lsFlds.length; i++) {
            if (cform[lsFlds[i]].value == ''){
                alert('Veld '+lsFlds[i]+ ' is verplicht.');
                ret = false;
            }
          }
          return ret;
          }