function insert(aTag, eTag, feld) {
	var input = document.forms['form1'].elements[feld];
	input.focus();
	/* für Internet Explorer */
	if(typeof document.selection != 'undefined') {
		/* Einfügen des Formatierungscodes */
		var range = document.selection.createRange();
		var insText = range.text;
		range.text = aTag + insText + eTag;
		/* Anpassen der Cursorposition */
		range = document.selection.createRange();
		if (insText.length == 0) {
			range.move('character', -eTag.length);
		} else {
			range.moveStart('character', aTag.length);
			range.moveEnd('character', -eTag.length);
		}
		range.select();
	}
	/* für neuere auf Gecko basierende Browser */
	else if(typeof input.selectionStart != 'undefined')
		{
			/* Einfügen des Formatierungscodes */
			var start = input.selectionStart;
			var end = input.selectionEnd;
			var insText = input.value.substring(start, end);
			input.value = input.value.substr(0, start) + aTag + insText + eTag + input.value.substr(end);
			/* Anpassen der Cursorposition */
			var startPos, endPos;
			if (insText.length == 0) {
				startPos = endPos = start + aTag.length;
			} else {
				startPos = start + aTag.length;
				endPos = startPos + insText.length;
			}
			input.selectionStart = startPos;
			input.selectionEnd = endPos;
		}
		/* für die übrigen Browser */
		else
			{
				/* Abfrage der Einfügeposition */
				var pos;
				var re = new RegExp('^[0-9]{0,3}$');
				while(!re.test(pos)) {
					pos = prompt("Einfügen an Position (0.." + input.value.length + "):", "0");
				}
				if(pos > input.value.length) {
					pos = input.value.length;
				}
				/* Einfügen des Formatierungscodes */
				var insText = prompt("Bitte geben Sie den zu formatierenden Text ein:");
				input.value = input.value.substr(0, pos) + aTag + insText + eTag + input.value.substr(pos);
			}
		}

		function switchlayer(Layer_Name, Icon)
		{
			var GECKO = document.getElementById? 1:0 ;
			var NS = document.layers? 1:0 ;
			var IE = document.all? 1:0 ;
			if (GECKO)
			{
				document.getElementById(Layer_Name).style.display=
				(document.getElementById(Layer_Name).style.display=='block') ? 'none' : 'block';
			}
			else if (NS)
			{
				document.layers[Layer_Name].display=(document.layers[Layer_Name].display=='block') ? 'none' : 'block';
			}
			else if (IE)
			{
				document.all[Layer_Name].style.display=(document.all[Layer_Name].style.display=='block') ? 'none' : 'block';
			}
			if(document.getElementById(Layer_Name).style.display=='block')
			{
				window.document.images[Icon].src = 'news_system/data/graphic/h_auf.png';
			}
			else
			{
				window.document.images[Icon].src = 'news_system/data/graphic/h_zu.png';
			}
		}