function toggle(div_id, body) {
	var el = document.getElementById(div_id);
	var body = document.getElementById(body);
	
	if (el.style.display == 'none') {
		el.style.display = 'block';
	} else {
		el.style.display = 'none';
	}
}

function blanket_size(popUpDivVar) {
	blanket_height = 100;
	
	var blanket = document.getElementById('blanket');
	blanket.style.height = blanket_height + '%';
	
	var popUpDiv = document.getElementById(popUpDivVar);
	
	//Positionionera popUpDiv 100px från övre kanten av fönstret
	popUpDiv.style.top = 100 + 'px';
	
}

function window_pos(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportwidth = window.innerHeight;
	} else {
		viewportwidth = document.documentElement.clientHeight;
	}
	
	if ((viewportwidth > document.body.parentNode.scrollWidth) && (viewportwidth > document.body.parentNode.clientWidth)) {
		window_width = viewportwidth;
	} else {
		if (document.body.parentNode.clientWidth > document.body.parentNode.scrollWidth) {
			window_width = document.body.parentNode.clientWidth;
		} else {
			window_width = document.body.parentNode.scrollWidth;
		}
	}
	
	var popUpDiv = document.getElementById(popUpDivVar);
	window_width=window_width/2-400;//150 is half popup's width
	popUpDiv.style.left = window_width + 'px';
}

function popupCal(windowname) {
	blanket_size(windowname);
	window_pos(windowname);
	toggle('blanket');
	toggle(windowname);		
}