// Checks the forms for correct input

function checkform ( form )
{

    if (form.name.value == "Uw naam") {
        alert( "Voer uw naam in aub" );
        form.name.focus();
        return false ;
    }
   
    if (form.email.value == "Uw e-mail adres") {
        alert( "Voer een geldig e-mail adres in aub" );
        form.email.focus();
        return false ;
    }


    	return true ;
}

// Switches standard text in forms

function alterNate(elm){
	if (!elm.base) elm.base = elm.value
	if (elm.value == elm.base) elm.value = "";
	else if (elm.value == "") elm.value = elm.base;
}


// toggle visibility 

function toggle( targetId ){
  if (document.getElementById){
  		target = document.getElementById( targetId );
  			if (target.style.display == "none"){
  				target.style.display = "";
  			} else {
  				target.style.display = "none";
  			}
  	}
}

// ---------------------------------------------------------------------
// This code is taken from the k10k script library (http://www.k10k.net)
// ---------------------------------------------------------------------


// Detecting client browser	


var its;
	var browserName;
	var browserNameLong;
	var browserNew;
	var preloadFlag = false;
	var Macintosh = navigator.userAgent.indexOf('Mac')>0;

	function its() {
		var n = navigator;
		var ua = ' ' + n.userAgent.toLowerCase();
		var pl = n.platform.toLowerCase();
		var an = n.appName.toLowerCase();

		// browser version
		this.version = n.appVersion;
		this.nn = ua.indexOf('mozilla') > 0;

		// 'compatible' versions of mozilla aren't navigator
		if(ua.indexOf('compatible') > 0) {
			this.nn = false;
		}
		
		this.opera = ua.indexOf('opera') > 0;
		this.ie = ua.indexOf('msie') > 0;
		this.major = parseInt( this.version );
		this.minor = parseFloat( this.version );

		// platform
		this.mac = ua.indexOf('mac') > 0;
		this.win = ua.indexOf('win') > 0;

		// workaround for IE5 which reports itself as version 4.0
		if(this.ie) {
			if(ua.indexOf("msie 5") > 1) {
			var msieIndex = navigator.appVersion.indexOf("MSIE") + 5;
			this.major = parseFloat(navigator.appVersion.substr(msieIndex,3));
			}
		}

		return this;
	}

	function browserNaming() {
		its = new its();
		
		// is it a DOM-enabled browser?
		if (!document.getElementById) {
			browserNew = false;
		}
		else {
			browserNew = true;
		}

		// need the name, too
		if (its.opera) {
			browserName = "Opera";
		}
		else if (its.ie) {
			browserName = "IE";
		}
		else {
			browserName = "NS";
		}

		// and the number
		browserNameLong = browserName + its.major;
	
	}

// Open popup

	function spawnWindow(desktopURL,windowName,width,height,scroll) {
 		if (Macintosh) {
 			if (browserNameLong == "IE4") {
				newheight = parseInt(height + 17);
			}
			else if (browserNameLong == "IE4.5") {
				newheight = parseInt(height + 17);
			}
			else {
				newheight = height;
			}
 		}
 		else { newheight = height; }	
 		window.open(desktopURL, windowName, "toolbar=no,location=no,status=yes,menubar=no,scrollbars="+scroll+",width="+width+",height="+newheight+",resizable=no" );
	}



//link from popup to parentwindow
//Usage: <a href="url to open in parent" onClick="return targetopener(this)">link title</a>


function targetopener(mylink, closeme, closeonly)
{
if (! (window.focus && window.opener))return true;
window.opener.focus();
if (! closeonly)window.opener.location.href=mylink.href;
if (closeme)window.close();
return false;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}