var bw = new lib_bwcheck();

function lib_bwcheck(){ //Browsercheck (needed)
	this.ver=navigator.appVersion;
	this.agent=navigator.userAgent;
	this.dom=document.getElementById?1:0
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0;
	this.ie4=(document.all && !this.dom)?1:0;
	this.moz= (this.agent.indexOf("Gecko/")>-1 && this.dom)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6
	this.mac=this.agent.indexOf("Mac")>-1
	this.opera5=this.agent.indexOf("Opera 5")>-1
	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0;
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie6 || this.ie5 || this.ie4 || this.moz || this.ns4 || this.ns6 || this.opera5 || this.dom)
	return this
}

function FindById(id)
{
	if (bw.ie4)
		return  document.all[id];
	if (bw.dom)
		return document.getElementById(id)
}

function showhideDiv(obj, blnOn) {				
	if (bw.ns4) 		eval("document.layers[\"" + obj + "\"].visibility=(blnOn)?\"show\":\"hide\"")
	if (bw.ie4) 		eval("document.all[\"" + obj + "\"].style.visibility=(blnOn)?\"visible\":\"hidden\"")
	if (bw.dom) 		eval("document.getElementById(\"" + obj + "\").style.visibility=(blnOn)?\"visible\":\"hidden\"")
}

function showhideAny(obj, blnOn) {				
	if (bw.ns4) {	
		eval("document.layers[\"" + obj + "\"].visibility=(blnOn)?\"show\":\"hide\"")		
	}
	if (bw.ie4) {
		eval("document.all[\"" + obj + "\"].style.visibility=(blnOn)?\"visible\":\"hidden\"")
		eval("document.all[\"" + obj + "\"].style.display=(blnOn)?\"block\":\"none\"")
	}
	if (bw.dom) {
		eval("document.getElementById(\"" + obj + "\").style.visibility=(blnOn)?\"visible\":\"hidden\"")
		eval("document.getElementById(\"" + obj + "\").style.display=(blnOn)?\"\":\"none\"")
	}
}

function toggleAny(obj) {				
	if (bw.ns4) {
		var blnOff = document.layers[obj].visibility == 'hide';
		eval("document.layers[\"" + obj + "\"].visibility=(blnOff)?\"show\":\"hide\"")
		return blnOff;		
	}
	if (bw.ie4) {
		var blnOff = document.all[obj].style.visibility == 'hidden';
		eval("document.all[\"" + obj + "\"].style.visibility=(blnOff)?\"visible\":\"hidden\"")
		eval("document.all[\"" + obj + "\"].style.display=(blnOff)?\"block\":\"none\"")
		return blnOff;
	}
	if (bw.dom) {		
		var blnOff = document.getElementById(obj).style.visibility == 'hidden';
		eval("document.getElementById(\"" + obj + "\").style.visibility=(blnOff)?\"visible\":\"hidden\"")
		eval("document.getElementById(\"" + obj + "\").style.display=(blnOff)?\"\":\"none\"")		
		return blnOff;
	}
}

function toggleAnyWithText(obj, link, ontext, offtext) {				
	var blnOn = toggleAny(obj)
	
	if (bw.ie4) {
		document.all[id].innerText	= (blnOn ? ontext : offtext);
	}
	else if (bw.ie) {
		document.getElementById(link).innerText	= (blnOn ? offtext : ontext);
	}
	else if (bw.moz) {		
		document.getElementById(link).textContent = (blnOn ? offtext : ontext);
	}
	
}

function flipSquare(id,mode) {
	var imgOff	= 'layout/images/menu/menu_square.gif';
	var imgOn	= 'layout/images/menu/menu_square_on.gif';
	var plaatje = FindById(id);

	plaatje.src	= (mode == 'on') ? imgOn : imgOff;
}

//cookie functions from http://www.webmasterbase.com/static/popjs.php
function getCookieVal (offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
		endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) 
			break; 
	}
	return null;
}

function SetCookie (name, value) {
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (2 < argc) ? argv[2] : null;
	var path = (3 < argc) ? argv[3] : null;
	var domain = (4 < argc) ? argv[4] : null;
	var secure = (5 < argc) ? argv[5] : false;
	document.cookie = name + "=" + escape (value) +
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	((path == null) ? "" : ("; path=" + path)) +
	((domain == null) ? "" : ("; domain=" + domain)) +
	((secure == true) ? "; secure" : "");
}

function SelectedValue(radiobuttonlist)
{
	var list = document.getElementsByName(radiobuttonlist);
	for (var i=0;i<list.length;i++)	{
		if (list[i].checked) {
			return list[i].value;
		}
	}
}

function LaunchPopup( sURL , sWidth, sHeight, sPopupName, bToolbars) {
  var dPerc;
  var sToolbars;

  sToolbars = ""
 
  if (!sPopupName)
	  sPopupName = 'wndPopup'

  if (!sWidth)
	sWidth = "400"
  else
	sWidth = sWidth.toString()
  if (!sHeight)
	sHeight = "300"
  else
	sHeight = sHeight.toString()

  if (bToolbars)
	sToolbars = ",location=yes,menubar=yes,status=yes,titlebar=yes,toolbar=yes"

  // % must be the last character if a percentage of the screen must be show
  if (sHeight.indexOf('%') == sHeight.length-1) {
		// Calculate relative height of screen with screensize as maximum
		dPerc = sHeight.substr(0,sHeight.length-1).valueOf() / 100.0;
		sHeight = window.screen.availHeight * dPerc;
  }
  if (sWidth.indexOf('%') == sWidth.length-1) {
		// Calculate relative width of screen with screensize as maximum
		dPerc = sWidth.substr(0,sWidth.length-1).valueOf() / 100.0;
		sWidth = window.screen.availWidth * dPerc;
  }
  //Centreer de offerte op het scherm
  var iTop, iLeft
  iLeft = (window.screen.availWidth - sWidth.valueOf()) / 2
  iTop = (window.screen.availHeight - sHeight.valueOf()) / 2
  
  window.open( sURL, sPopupName,'resizable=yes,scrollbars=yes,top=' + iTop +',left=' + iLeft +',width=' + sWidth + ',height=' + sHeight + sToolbars);
}