function bbcode(form,field,v)
{
 if (document.selection) // for IE
   {
    var str = document.selection.createRange().text;
    document.forms[form].elements[field].focus();
    var sel = document.selection.createRange();
    sel.text = "<" + v + ">" + str + "</" + v + ">";
    return;
   }
  else if ((typeof document.forms[form].elements[field].selectionStart) != 'undefined') // for Mozilla
   {
    var txtarea = document.forms[form].elements[field];
    var selLength = txtarea.textLength;
    var selStart = txtarea.selectionStart;
    var selEnd = txtarea.selectionEnd;
    var oldScrollTop = txtarea.scrollTop;
    var s1 = (txtarea.value).substring(0,selStart);
    var s2 = (txtarea.value).substring(selStart, selEnd)
    var s3 = (txtarea.value).substring(selEnd, selLength);
    txtarea.value = s1 + '<' + v + '>' + s2 + '</' + v + '>' + s3;
    txtarea.selectionStart = s1.length;
    txtarea.selectionEnd = s1.length + 5 + s2.length + v.length * 2;
    txtarea.scrollTop = oldScrollTop;
    txtarea.focus();
    return;
   }
  else insert(form,field,'<' + v + '></' + v + '> ');
 }

function insert_fontsize(form,field,v)
{
 if (document.selection) // for IE
   {
    var str = document.selection.createRange().text;
    document.forms[form].elements[field].focus();
    var sel = document.selection.createRange();
    sel.text = "<font size=" + v + ">" + str + "</font>";
    return;
   }
  else if ((typeof document.forms[form].elements[field].selectionStart) != 'undefined') // for Mozilla
   {
    var txtarea = document.forms[form].elements[field];
    var selLength = txtarea.textLength;
    var selStart = txtarea.selectionStart;
    var selEnd = txtarea.selectionEnd;
    var oldScrollTop = txtarea.scrollTop;
    var s1 = (txtarea.value).substring(0,selStart);
    var s2 = (txtarea.value).substring(selStart, selEnd)
    var s3 = (txtarea.value).substring(selEnd, selLength);
    txtarea.value = s1 + '<font size=' + v + '>' + s2 + '</font>' + s3;
    txtarea.selectionStart = s1.length;
    txtarea.selectionEnd = s1.length + 5 + s2.length + v.length * 2;
    txtarea.scrollTop = oldScrollTop;
    txtarea.focus();
    return;
   }
  else insert(form,field,'<font size=' + v + '></font>');
 }


function insert(form,field,what)
 {
  if (document.forms[form].elements[field].createTextRange)
   {
    document.forms[form].elements[field].focus();
    document.selection.createRange().duplicate().text = what;
   }
  else if ((typeof document.forms[form].elements[field].selectionStart) != 'undefined') // für Mozilla
   {
    var tarea = document.forms[form].elements[field];
    var selEnd = tarea.selectionEnd;
    var txtLen = tarea.value.length;
    var txtbefore = tarea.value.substring(0,selEnd);
    var txtafter =  tarea.value.substring(selEnd, txtLen);
    var oldScrollTop = tarea.scrollTop;
    tarea.value = txtbefore + what + txtafter;
    tarea.selectionStart = txtbefore.length + what.length;
    tarea.selectionEnd = txtbefore.length + what.length;
    tarea.scrollTop = oldScrollTop;
    tarea.focus();
   }
  else
   {
    document.forms[form].elements[field].value += what;
    document.forms[form].elements[field].focus();
   }
 }

function insert_link(form,field)
 {
 var link_text='Link text (optional):';
 var link_target='Link target (URL):';

 if (document.selection) // for IE
   {
    var str = document.selection.createRange().text;
    document.forms[form].elements[field].focus();
    var sel = document.selection.createRange();
    var insert_link = prompt(link_target,'http://');
    if(sel.text=='' && insert_link!='' && insert_link!=null) str = prompt(link_text,'');

    if(insert_link && str!=null)
     {
      if(str!='')
       {
        sel.text = "<a href='" + insert_link + "'>" + str + "</a>";
       }
      else
       {
        sel.text = "<a href=''>" + insert_link + "</a>";
       }
     }
    return;
   }
  else if ((typeof document.forms[form].elements[field].selectionStart) != 'undefined') // for Mozilla
   {
    var txtarea = document.forms[form].elements[field];
    var selLength = txtarea.textLength;
    var selStart = txtarea.selectionStart;
    var selEnd = txtarea.selectionEnd;
    var oldScrollTop = txtarea.scrollTop;
    var s1 = (txtarea.value).substring(0,selStart);
    var s2 = (txtarea.value).substring(selStart, selEnd);
    var s3 = (txtarea.value).substring(selEnd, selLength);

    var insert_link = prompt(link_target,'http://');
    if(selEnd-selStart==0 && insert_link!='' && insert_link!=null) s2 = prompt(link_text,'');
    if(insert_link && s2!=null)
     {
      if(s2!='')
       {
        txtarea.value = s1 + '<a href="' + insert_link + '">' + s2 + '</a>' + s3;
       }
      else
       {
        txtarea.value = s1 + '<a href="">' + insert_link + '</a>' + s3;
       }
      txtarea.selectionStart = s1.length;
      txtarea.selectionEnd = s1.length + 5 + s2.length + v.length * 2;
      txtarea.scrollTop = oldScrollTop;
      txtarea.focus();
      return;
     }
   }
  else insert('<a href="http://www.xyz.at">Link</a>');
 }

function smilie(smilie) {
	document.gbform.Beitrag.value += smilie+" ";
}

function textchange(id,stile) {
  document.getElementById(id).className = stile;
}

function checkFormValues()
{ 
  if (document.Formular.email.value=="")
  {
    alert ('Bitte geben Sie uns Ihre E-Mail Adresse bekannt!');
    document.Formular.email.focus();
    return false;
  }
  return true; 
} 

/*Layer anzeigen*/
function showLayer(layerid){
	document.getElementById(layerid).style.visibility = "visible";
}

/*Layer verstecken*/
function hideLayer(layerid){
	document.getElementById(layerid).style.visibility = "hidden";
}