function insertLinkAtPosition(inputFieldName) {
	var before = '[Link url="';
	var afer = '" name="link_name_eingeben"]';
	insertAtPosition(before, afer, inputFieldName);
}

function insertPictureAtPosition(inputFieldName) {
	var before = '[Bild url="';
	var afer = '" name="bild_name_eingeben"]';
	insertAtPosition(before, afer, inputFieldName);
}

function insertAtPosition(aTag, eTag, inputFieldName) {
	var input = document.forms['storyEdit'].elements[inputFieldName];
	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 + insText.length
					+ 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 pos;
		if (insText.length == 0) {
			pos = start + aTag.length;
		} else {
			pos = start + aTag.length + insText.length + eTag.length;
		}
		input.selectionStart = pos;
		input.selectionEnd = pos;
	}
	/* 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);
	}
}