if (document.images) {

keuze1link = "basis_keuring.php";
keuze2link = "verkoop_keuring.php";
keuze3link = "huis_eigenaren.php";
keuze4link = "makelaars.php";

keuze1on = new Image(); 
keuze1on.src = "images/keuze1.gif"; 
keuze2on = new Image();
keuze2on.src = "images/keuze2.gif"; 
keuze3on = new Image();
keuze3on.src = "images/keuze3.gif";
keuze4on = new Image(); 
keuze4on.src = "images/keuze4.gif";
keuze5on = new Image(); 
keuze5on.src = "images/keuze5.jpg";
keuze6on = new Image(); 
keuze6on.src = "images/keuze6.jpg";
keuze7on = new Image();
keuze7on.src = "images/keuze7.jpg";
keuze8on = new Image(); 
keuze8on.src = "images/keuze8.jpg";
keuze9on = new Image(); 
keuze9on.src = "images/keuze9.jpg";
keuze10on = new Image(); 
keuze10on.src = "images/keuze10.jpg";
keuze11on = new Image(); 
keuze11on.src = "images/keuze11.jpg";
keuze12on = new Image(); 
keuze12on.src = "images/keuze12.jpg";




keuze1off = new Image(); 
keuze1off.src = "images/keuze1_over.gif"; 
keuze2off = new Image(); 
keuze2off.src = "images/keuze2_over.gif";
keuze3off = new Image(); 
keuze3off.src = "images/keuze3_over.gif";
keuze4off = new Image(); 
keuze4off.src = "images/keuze4_over.gif";
keuze5off = new Image(); 
keuze5off.src = "images/keuze5-over.jpg";
keuze6off = new Image(); 
keuze6off.src = "images/keuze6-over.jpg";
keuze7off = new Image(); 
keuze7off.src = "images/keuze7-over.jpg";
keuze8off = new Image(); 
keuze8off.src = "images/keuze8-over.jpg";
keuze9off = new Image(); 
keuze9off.src = "images/keuze9-over.jpg";
keuze10off = new Image(); 
keuze10off.src = "images/keuze10-over.jpg";
keuze11off = new Image(); 
keuze11off.src = "images/keuze11-over.jpg";
keuze12off = new Image(); 
keuze12off.src = "images/keuze12-over.jpg";


keuze1ad = new Image();
keuze1ad.src = "images/huiskopers.gif";
keuze2ad = new Image();
keuze2ad.src = "images/huisverkopers.gif";
keuze3ad = new Image();
keuze3ad.src = "images/eigenaren.gif";
keuze4ad = new Image();
keuze4ad.src = "images/makelaars.gif";
keuze5ad = new Image();
keuze5ad.src = "images/huiskopers.gif";
keuze6ad = new Image();
keuze6ad.src = "images/huiskopers.gif";
keuze7ad = new Image();
keuze7ad.src = "images/huiskopers.gif";
keuze8ad = new Image();
keuze8ad.src = "images/huisverkopers.gif";
keuze9ad = new Image();
keuze9ad.src = "images/makelaars.gif";
keuze10ad = new Image();
keuze10ad.src = "images/eigenaren.gif";
keuze11ad = new Image();
keuze11ad.src = "images/eigenaren.gif";
keuze12ad = new Image();
keuze12ad.src = "images/makelaars.gif";


neutraal = new Image();
neutraal.src = "images/huiskopers.gif";
CurrentImg = 'keuze1';
}
function imgOn(imgName) {
if (document.images) {
CurrentImg = imgName
document[imgName].src = eval(imgName + "on").src;
document["common"].src = eval(imgName + "ad").src;
}
}

function imgOff(imgName) {
if (document.images) {
document[imgName].src = eval(imgName + "off").src;
}
}

function AfbClick() {
  location = eval(CurrentImg + "link");
}


if (document.images) {

image1 = new Image 
image2 = new Image 
image1.src = 'images/home.gif' 
image2.src = 'images/home_over.gif' 

image3 = new Image 
image4 = new Image 
image3.src = 'images/bk.gif' 
image4.src = 'images/bk_over.gif' 

image5 = new Image 
image6 = new Image 
image5.src = 'images/op.gif' 
image6.src = 'images/op_over.gif' 

image7 = new Image 
image8 = new Image 
image7.src = 'images/ww.gif' 
image8.src = 'images/ww_over.gif' 

image9 = new Image 
image10 = new Image 
image9.src = 'images/r.gif' 
image10.src = 'images/r_over.gif' 

image11 = new Image 
image12 = new Image 
image11.src = 'images/c.gif' 
image12.src = 'images/c_over.gif' 

image13 = new Image 
image14 = new Image 
image13.src = 'images/keuze10_over.gif' 
image14.src = 'images/keuze10.gif' 

image15 = new Image 
image16 = new Image 
image15.src = 'images/keuze20_over.gif' 
image16.src = 'images/keuze20.gif' 

image17 = new Image 
image18 = new Image 
image17.src = 'images/keuze30_over.gif' 
image18.src = 'images/keuze30.gif' 

image19 = new Image 
image20 = new Image 
image19.src = 'images/keuze40_over.gif' 
image20.src = 'images/keuze40.gif' 
} 
     function checkvalues(form1) {
       if ( 
           (form1.name.value == "") || 
           (form1.email.value == "")
          ) 
       {
         alert("Niet alle verplichte velden zijn ingevuld");
         return (false);
       }  
       if (!form1.voorwaardenakkoord.checked)
       {
         alert("Wilt u eerst akkoord gaan met de Algemene Voorwaarden door middel van een vinkje?");
         return (false);
       }

     }