// video popups
function videoSB() {
	props=window.open('http://www.dienen.org/video_sb.html', 'poppage', 'toolbars=0, scrollbars=0, location=0, statusbars=0, menubars=0, resizable=0, width=160, height=120, left = 100, top = 100');
}

function videoBB() {
	props=window.open('http://www.dienen.org/video_bb.html', 'poppage', 'toolbars=0, scrollbars=0, location=0, statusbars=0, menubars=0, resizable=0, width=320, height=240, left = 100, top = 100');
}

// Swap layers
function getStyle( layer ) {
	if( document.getElementById ) {
		return document.getElementById( layer ).style
		} 
	else if( document.all ) {
		return document.all[layer].style
		} 
	else {
		return document[layer]
		}
	}

function showLayer(laag)	{
	getStyle(laag).visibility = "visible";
	getStyle(laag).display = "block";
	}
	
function hideLayer(laag)	{
	getStyle(laag).visibility = "hidden";
	getStyle(laag).display = "none";
	}
	
// landenmap mouseovers
 function showCountryName(landnaam)	{
	document.images['landnaam'].src = "images/map_" + landnaam + ".gif";
}
    
// landenkeuze dropdown
	function changePage(url)	{
	open(url);
}
			
			
//geboortedatum controle
function aanvullen(currentForm)	{
currentForm.elements[elementIndex+1].focus();
}

function geboortedatum(currentForm,currentElement)		{
for(i=0;i<currentForm.elements.length;i++)	{
	if(currentForm.elements[i] == currentElement)	{
		elementIndex = i;
		}
	}
elementName = currentElement.name;

switch(elementName)	{
	case "geboortedag":
		eerstegetal = currentElement.value.substring(0,1);
		if(eerstegetal > 3)	{
			currentElement.value = "0" + eerstegetal;
			aanvullen(currentForm);
			}
		if(currentElement.value.length > 1)	{
			if(currentElement.value > 31)	{
				currentElement.value = 31;
				}
			aanvullen(currentForm);
			}
	break;
	
	case "geboortemaand":
		eerstegetal = currentElement.value.substring(0,1);
		if(eerstegetal > 1)	{
			currentElement.value = "0" + eerstegetal;
			aanvullen(currentForm,currentElement);
			}
		if(currentElement.value.length > 1)	{
			if(currentElement.value > 12)	{
				currentElement.value = 12;
				}
			aanvullen(currentForm);
			}	
	break;
	
	default:
		//mag niet voorkomen
	break
	}
}

function checkVink(givinValue, vinkId) {
	if(givinValue != ''){document.getElementById(vinkId).checked = true;}
	else{document.getElementById(vinkId).checked = false;}
}

function checkTheVink(id,secondId){
	
	if(secondId != ""){
		if( (document.getElementById(id).checked == false) && (document.getElementById(secondId).checked == false) ) {
			document.getElementById("fc_verzendKnop").enabled = false;
			document.getElementById(id).parentNode.style.color = "red";
			document.getElementById(secondId).parentNode.style.color = "red";
			alert("Er is een fout opgetreden:\nU heeft nog geen vinkje gezet");
		}
		else{
			document.getElementById("fc_verzendKnop").enabled = true;
			document.getElementById(id).parentNode.style.color = "black";
			document.getElementById(secondId).parentNode.style.color = "black";
		}
	}
	else{	
		if(document.getElementById(id).checked == false){
			document.getElementById("fc_verzendKnop").enabled = false;
			document.getElementById(id).parentNode.style.color = "red";
			alert("Er is een fout opgetreden:\nU heeft nog geen vinkje gezet");	
		}
		else{
			document.getElementById("fc_verzendKnop").enabled = true;
			document.getElementById(id).parentNode.style.color = "black";
		}
	}	
}