function scale_content(actief) {
	// standaard op 146px

	var viewportwidth;
	var viewportheight;
	
	// the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
	
	if (typeof window.innerWidth != 'undefined') {
		viewportwidth = window.innerWidth,
		viewportheight = window.innerHeight
	}
	
	// IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
	
	else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0)
	{
		viewportwidth = document.documentElement.clientWidth,
		viewportheight = document.documentElement.clientHeight
	}
	
	// older versions of IE
	
	else
	{
		viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
		viewportheight = document.getElementsByTagName('body')[0].clientHeight
	}
	
	// alert('Your viewport width is '+viewportwidth+'x'+viewportheight);
	var viewportheightminus;
	viewportheightminus = viewportheight - 45;
	if (viewportheightminus > 150) {
		if (viewportheightminus > document.getElementById("container").offsetHeight) {
			document.getElementById("container").style.height= viewportheightminus+'px';
			if (actief == "home") {
				var viewportheightminushome;
				viewportheightminushome = viewportheightminus - 130;
				document.getElementById("content-home").style.height= viewportheightminushome+'px';
			}
		}
		if (actief == "mkm" || actief == "contact") {
			
			var viewportheightminusmkm;
			viewportheightminusmkm = document.getElementById("container").offsetHeight - 120;
			// onderstaande zin zorgt wellicht voor een vastloper
			document.getElementById("sidebar-a").style.height= viewportheightminusmkm+'px';
			//alert('test! '+viewportheightminusmkm);
		}
	}
}