function validate(type,label_id,text){
	var tonen = false;
	try {
	   var element = document.getElementById("img_"+label_id+type);
	   var element2 = element.parentNode;

	} catch (e) {
		tonen = true;
	}
	if(tonen){
	 var htmlc ='<div id="error" class="'+label_id+type+'"><img src="images/error.png" id="img_'+label_id+type+'"/><span>'+ text +'</span></div>';
	 var warning = document.createElement(label_id+type+"_");
	 warning.setAttribute("id",label_id+type+"_");
	 
	 warning.innerHTML = htmlc;
		
	
	 var sp2 = document.getElementById(label_id);
	 var parentDiv = sp2.parentNode;
	
	 // insert the new element into the DOM before sp2
	 parentDiv.insertBefore(warning, sp2);
	}
}
function validate_goed(type,label_id){
	try {
		 var element = document.getElementById("img_"+label_id+type);
		 var element2 = element.parentNode;
		 
		 var Node = document.getElementById(label_id+type+"_");
		 Node.parentNode.removeChild(Node);
		 

		 //element2.style.visibility = 'hidden';
		 //element2.style.position = 'absolute';
		 //element2.style.top = 0;

	} catch (e) {
	}
}
function check_contact(){
	var versturen = true;
	var naam,email;
	email = document.getElementById('i_email').value;
	naam = document.getElementById('i_naam').value;
	opmerkingen = document.getElementById('i_opmerkingen').value;
	
	if(naam.length < 3){
		versturen = false;
		
		validate('check','lb_naam','Vul uw <b>naam</b> in.');
	}else{
		validate_goed('check','lb_naam');
	}
	if(email.length < 3){
		versturen = false;
		validate('check','lb_email','Vul uw <b>E-mail</b> in.');
	}else{
		validate_goed('check','lb_email');
	}	
	if(opmerkingen.length < 3){
		versturen = false;
		validate('check','lb_opmerkingen','Vul een <b>opmerking</b> in.');
	}else{
		validate_goed('check','lb_opmerkingen');
	}
	
	return versturen;
}