function setWorld() {
	var w = 0;
	var offset = 0;
	if (window.innerWidth) {
		/* Firefox */
		w = window.innerWidth;
		offset = 844;
		/* vertical scrollbar visible? */
		if(document.documentElement.scrollHeight > window.innerHeight) {
			offset -= 8;
		}
	} else if (document.body.offsetWidth) {
		/* IE */
		w = document.body.offsetWidth;		
		offset = 844;	
	}

	if (w > 0) {
		document.getElementById("weltkugel").style.display = 'block';	
		
		var nuLeft = Math.max(844,(w-1000)/2+offset);
		document.getElementById("weltkugel").style.left = nuLeft+"px";
	}

}

function toggleBox(id) {
	var obj = document.getElementById(id);
	switch (obj.style.display) {
		case "block":
			obj.style.display = "none";
			document.images[id + "_p"].src = "/img/pfeil_zu.gif";
			break;
		case "none":
			obj.style.display = "block";
			document.images[id + "_p"].src = "/img/pfeil_auf.gif";			
			break;
	}
}