function checkForm(){

		errmsg = ""
		
		blogurl = document.registerform.url_blog.value
		if(blogurl.substring(0,7) != "http://" && blogurl != ""){
			errmsg = "Ongeldige URL ; de opgegeven URL begint niet met http://"
			document.registerform.url_blog.focus()
			document.registerform.url_blog.select()
		}
		if(document.registerform.email.value == ""){
			errmsg = "Gelieve je e-mailadres in te vullen."
			document.registerform.email.focus()
		}	
		if(document.registerform.naam.value == ""){
			errmsg = "Gelieve je naam in te vullen."
			document.registerform.naam.focus()
		}	
		if(document.registerform.voornaam.value == ""){
			errmsg = "Gelieve je voornaam in te vullen."
			document.registerform.voornaam.focus()
		}	

		
		if(errmsg == ""){
			document.registerform.antis.value = "Mvx71s03wP"
			document.registerform.submit(); 
			return false;
		}else{
			alert(errmsg)
			return false;
		}

	}
	
	function highlight_form(){
		document.registerform.voornaam.focus()
	}