function validater() { if ((document.getElementById('realname').value == "") || (document.getElementById('realname').value == " ")) { alert("Vul uw naam in."); document.getElementById('realname').focus(); return (false); }if ((document.getElementById('email').value == "") || (document.getElementById('email').value == " ")) { alert("Vul uw emailadres in."); document.getElementById('email').focus(); return (false); }return (true); }
function textfocus(obj) { obj.style.backgroundImage = ''; }
function textblur(obj,image) { if (obj.value == '') { obj.style.background = '#FFFFFF url(' + image + ') no-repeat left center'; }}
function starten() {
 textblur(document.getElementById('realname'),'../images/form_naam.gif');
 textblur(document.getElementById('subject'),'../images/form_onderwerp.gif');
 textblur(document.getElementById('email'),'../images/form_email.gif');
 textblur(document.getElementById('adres1'),'../images/form_woonplaats.gif');
 textblur(document.getElementById('opmerking'),'../images/form_vraag.gif');
}
imgs=Array("../images/route1.jpg","../images/route1.jpg","../images/route2.jpg");
var x=1;
function change_route() { document.getElementById("route").src=imgs[++x]; if (x==2) { x=0; }}