function check_br(e){
				var code;
				if(!e) var e=window.event;
				if(e.keyCode) code=e.keyCode;
				else if(e.which) code= e.which;
				else return true;
				if(code==13)insert('<br>','');
			}
			function insert(aTag, eTag) {
			  var input = document.forms['form'].elements['comment'];
			  input.focus();
			  /* f?ernet Explorer */
			  if(typeof document.selection != 'undefined') {
			    /* Einf?es 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();
			  }
			  /* f?ere auf Gecko basierende Browser */
			  else if(typeof input.selectionStart != 'undefined')
			  {
			    /* Einf?es 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;
			  }
			  /* f? ?n Browser */
			  else
			  {
			    /* Abfrage der Einf?ition */
			    var pos;
			    var re = new RegExp('^[0-9]{0,3}$');
			    while(!re.test(pos)) {
			      pos = prompt("Einf?n Position (0.." + input.value.length + "):", "0");
			    }
			    if(pos > input.value.length) {
			      pos = input.value.length;
			    }
			    /* Einf?es 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);
			  }
			}