function initialize() {
	vp = getViewport();

	cel = document.getElementById('content');
	k1el = document.getElementById('kolom1');
	k2el = document.getElementById('kolom2');
	cel.style.height = vp.height-250+'px';
	k1el.style.height = vp.height-250+'px';
	k2el.style.height = vp.height-250+'px';

	
	corrX = ((vp.width-980)/2)*-1;//-20;
	if(corrX > 0) corrX = 0;
	//corrX = 0;//-20;
	//debug = document.getElementById("debug");
}

function getViewport()
{
	var viewport = {x:0,y:0,width:0,height:0};

	if (typeof window.scrollX != 'undefined')
	{
		viewport.x = window.pageXOffset;
		viewport.y = window.pageYOffset;
		viewport.width = window.innerWidth;
		viewport.height = window.innerHeight;
//		alert("1-"+viewport.height);
		return viewport;
	}
	else
	{
		if (document.documentElement &&
		(typeof document.documentElement.scrollLeft != 'undefined') &&
		(document.documentElement.scrollLeft != 0))
		{
			viewport.x = document.documentElement.scrollLeft;
			viewport.y = document.documentElement.scrollTop;
			viewport.width = document.documentElement.clientWidth;
			viewport.height = document.documentElement.clientHeight;
//			alert("2-"+viewport.height);
			return viewport;
		}
		else
		{
			if (document.body &&
			(typeof document.body.scrollLeft != 'undefined'))
			{
				viewport.x = document.body.scrollLeft;
				viewport.y = document.body.scrollTop;
/*
				if (document.compatMode == "CSS1Compat")
				{
					viewport.width = document.body.parentNode.clientWidth;
					viewport.height = document.body.parentNode.clientHeight;
//					alert("3-"+viewport.height);
				}
				else
				{*/
					viewport.width = document.body.clientWidth;
					viewport.height = document.body.clientHeight;
//					alert("4-"+viewport.height);
				//}

				return viewport;
			}
		}
	}

	return null;
}