function insert_bbcode_tag(begin_tag, end_tag, form, field) {
  	var input = document.forms[form].elements[field];
  	input.focus();
  	if (typeof document.selection != 'undefined') {
    	var range = document.selection.createRange();
    	var insert_text = range.text;
    	range.text = begin_tag + insert_text + end_tag;
    	range = document.selection.createRange();
    	if (insert_text.length == 0) {
      		range.move('character', - end_tag.length);
    	} else {
      		range.moveStart('character', begin_tag.length + insert_text.length + end_tag.length);      
    	}
    	range.select();
  	} else if (typeof input.selectionStart != 'undefined') {
    	var start = input.selectionStart;
    	var end = input.selectionEnd;
    	var insert_text = input.value.substring(start, end);
    	input.value = input.value.substr(0, start) + begin_tag + insert_text + end_tag + input.value.substr(end);
    	var pos;
    	if (insert_text.length == 0) {
      		pos = start + begin_tag.length;
    	} else {
      		pos = start + begin_tag.length + insert_text.length + end_tag.length;
    	}   	
    	input.selectionStart = pos;
    	input.selectionEnd = pos;
  	} else {
    	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;
    	}
    	var insert_text = prompt("Bitte geben Sie den zu formatierenden Text ein:");
    	input.value = input.value.substr(0, pos) + begin_tag + insert_text + end_tag + input.value.substr(pos);
  	}
}
function anchor_confirm(text) {
	answer = confirm(text);
	return answer;
}
function button_confirm(text, link) {
	answer = confirm(text);
	if (answer) {
		window.location.href = link;
	} else {
	 	return FALSE;
	}
}