function plaatsflash(url, wijdte, hoogte, vars) {
if(vars) {url = url+"?"+vars;}
document.write("<object classid='clsid:d27cdb6e-ae6d-11cf-96b8-444553540000' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0' width='"+wijdte+"' height='"+hoogte+"' id='diafragma' align='middle'>");
document.write("<param name='allowScriptAccess' value='sameDomain' />");
document.write("<param name='movie' value='"+url+"' />");
document.write("<param name='quality' value='high' />");
document.write("<param name='bgcolor' value='#2d2d2d' />");
document.write("<embed src='"+url+"' quality='high' bgcolor='#2d2d2d' width='"+wijdte+"' height='"+hoogte+"' name='diafragma' align='middle' allowScriptAccess='sameDomain' type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/go/getflashplayer' />");
document.write("</object>");
}


function maximizeWindow() {
	var offset = (navigator.userAgent.indexOf("Mac") != -1 ||
		navigator.userAgent.indexOf("Gecko") != -1 ||
		navigator.appName.indexOf("Netscape") != -1) ? 0 : 4;
	window.moveTo(-offset, -offset);
	window.resizeTo(screen.availWidth + (2 * offset),
		screen.availHeight + (2 * offset));
}


function nav(item) {
switch(item) {
	case 1: location.href="index.php?p=2&nav=1"; break;
	case 2: location.href="index.php?p=2&nav=2"; break;
	case 3: location.href="index.php?p=4&nav=3"; break;
	case 4: location.href="index.php?p=3&nav=4"; break;
}
}


var focustabnr = 0;
var tabtotaal = 4;

function focustab(tabnr) {
//geef deze tab focus
id_l = "tab" + tabnr + "_l"; 
id_m = "tab" + tabnr + "_m"; 
id_r = "tab" + tabnr + "_r"; 
if(navigator.userAgent.indexOf("Firefox") != -1) {
	//ja firefox
	document.getElementById(id_l).style.backgroundImage = "url(images/tab_l_f.gif)";
	document.getElementById(id_m).style.backgroundImage = "url(images/tab_m_f.gif)";
	document.getElementById(id_r).style.backgroundImage = "url(images/tab_r_f.gif)";
} else {
	//nee firefox
	document.getElementById(id_l).background = "images/tab_l_f.gif";
	document.getElementById(id_m).background = "images/tab_m_f.gif";
	document.getElementById(id_r).background = "images/tab_r_f.gif";
}
}

function ontfocustab(tabnr) {
//ontfocus dit tab, tenzij de gefocuste
if(tabnr!=focustabnr) {
	id_l = "tab" + tabnr + "_l"; 
	id_m = "tab" + tabnr + "_m"; 
	id_r = "tab" + tabnr + "_r"; 
	if(navigator.userAgent.indexOf("Firefox") != -1) {
		//ja firefox
		document.getElementById(id_l).style.backgroundImage = "url(images/tab_l.gif)";
		document.getElementById(id_m).style.backgroundImage = "url(images/tab_m.gif)";
		document.getElementById(id_r).style.backgroundImage = "url(images/tab_r.gif)";
	} else {
		//nee firefox
		document.getElementById(id_l).background = "images/tab_l.gif";
		document.getElementById(id_m).background = "images/tab_m.gif";
		document.getElementById(id_r).background = "images/tab_r.gif";
	}
}
}

function ontfocusalletab(tabnr) {
//ontfocus dit tab, ongeacht de gefocuste als >0
if(tabnr>0) {
	id_l = "tab" + tabnr + "_l";
	id_m = "tab" + tabnr + "_m";
	id_r = "tab" + tabnr + "_r";
	if(navigator.userAgent.indexOf("Firefox") != -1) {
		//ja firefox
		if(document.getElementById(id_l)) {document.getElementById(id_l).style.backgroundImage = "url(images/tab_l.gif)";}
		if(document.getElementById(id_m)) {document.getElementById(id_m).style.backgroundImage = "url(images/tab_m.gif)";}
		if(document.getElementById(id_r)) {document.getElementById(id_r).style.backgroundImage = "url(images/tab_r.gif)";}
	} else {
		//nee firefox
		if(document.getElementById(id_l)) {document.getElementById(id_l).background = "images/tab_l.gif";}
		if(document.getElementById(id_m)) {document.getElementById(id_m).background = "images/tab_m.gif";}
		if(document.getElementById(id_r)) {document.getElementById(id_r).background = "images/tab_r.gif";}
	}
}
}

function showlayer(laagnaam, tabnr) {
ontfocusalletab(focustabnr);
focustabnr = tabnr;
focustab(tabnr);
for(i=1;i<=tabtotaal;i++) {
	laag = laagnaam+i;
	if(i==tabnr) {
		//show
		if(navigator.userAgent.indexOf("Firefox") != -1) {
			//ja firefox
			document.getElementById(laag).style.visibility = "visible";
			document.getElementById(laag).style.display = "block";
		} else {
			//nee firefox
			document.getElementById(laag).style.visibility = "visible";
			document.getElementById(laag).style.display = "block";
		}		
	} else {
		//hide
		if(navigator.userAgent.indexOf("Firefox") != -1) {
			//ja firefox
			document.getElementById(laag).style.visibility = "hidden";
			document.getElementById(laag).style.display = "none";
		} else {
			//nee firefox
			document.getElementById(laag).style.visibility = "hidden";
			document.getElementById(laag).style.display = "none";
		}		
	}
}
}