var iCurrentZoom = 100;
var ZoomFactor;
var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

// Retrieve ZoomFactor cookie and override iCurrentZoom
ZoomFactor = get_cookie("ZoomFactor");
if (ZoomFactor)
  iCurrentZoom = parseInt(ZoomFactor);

  
if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
}
else browser = "An unknown browser";

if (!version) 
  version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}


function Zoom(zoom)
{

	if (browser== "Internet Explorer" && OS=="Windows")
	  {
		var doc = parent.document;
		//var doc = document;
		var bodyStyle = doc.body.style;
    
		if (zoom != null) 
		  {
		  if ((zoom > 0 && iCurrentZoom <= 140) || (zoom < 0 && iCurrentZoom >= 70))
		    {
		    iCurrentZoom = iCurrentZoom + zoom;
			  set_cookie("ZoomFactor", iCurrentZoom, expires);
			  }
		  }
	  bodyStyle.setAttribute('zoom', parseInt(iCurrentZoom)+'%');
	  }
	else
	  {
	  // Ander type browser
		if(parseInt(zoom) > 0)
		  {
			//parent.hoofd.larger();
			larger();
		  }
		else
		  {
			//parent.hoofd.smaller();
			smaller();
		  }
	}
}




function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}