/* --- Radiert vordefinierte Werte in Inputs aus */
function clearText(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = ""
}

/* --- Popup-Opener ----------  */
var sUserAgent = navigator.userAgent.toLowerCase();
var isIE = document.all?true:false;
var isNS4 = document.layers?true:false;
var isOp = (sUserAgent.indexOf('opera')!=-1)?true:false;
var isMoz = (sUserAgent.indexOf('mozilla/5')!=-1 && sUserAgent.indexOf('opera')==-1 && sUserAgent.indexOf('msie')==-1)?true:false;
function pop(oAnchor,sWindow,sProps){
var sUrl = '';
if(oAnchor.getAttribute) sUrl = oAnchor.getAttribute('href');
if(sUrl=='' && isIE) sUrl = window.event.srcElement.getAttribute('href');
if(sUrl=='') sUrl = oAnchor.href;
var sWindowName = sWindow?sWindow:'_blank';
if(!sProps) sProps = 'width=640,height=480,scrollbars,resizable,toolbar,status,menubar,location,top=20,left=20';
if(sUrl) var oPopup = window.open(sUrl,sWindowName,sProps);
if(oPopup && !isOp) oPopup.focus();
return (oPopup)?false:true;
}

/* --- BB-Code-Funktion ---------------------------------------------------------------------------------  */
function bbcode(v,x)
 {
 if (document.selection) // für IE
   {
    var str = document.selection.createRange().text;
    document.forms['holdguestbook'].elements['itemcomment'].focus();
    var sel = document.selection.createRange();
    sel.text =   v  + str + x ;
    return;
   }
  else if ((typeof document.forms['holdguestbook'].elements['itemcomment'].selectionStart) != 'undefined') // für Mozilla
   {
    var txtarea = document.forms['holdguestbook'].elements['itemcomment'];
    var selLength = txtarea.textLength;
    var selStart = txtarea.selectionStart;
    var selEnd = txtarea.selectionEnd;
    var oldScrollTop = txtarea.scrollTop;
    //if (selEnd == 1 || selEnd == 2)
    //selEnd = selLength;
    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 + x + s3;
    txtarea.selectionStart = s1.length;
    txtarea.selectionEnd = s1.length + 5 + s2.length + v.length * 2;
    txtarea.scrollTop = oldScrollTop;
    return;
   }
  else insert(v +  x );
 }

function insert(what)
 {
  if (document.forms['holdguestbook'].elements['itemcomment'].createTextRange)
   {
    document.forms['holdguestbook'].elements['itemcomment'].focus();
    document.selection.createRange().duplicate().text = what;
   }
  else if ((typeof document.forms['holdguestbook'].elements['itemcomment'].selectionStart) != 'undefined') // für Mozilla
   {
    var tarea = document.forms['holdguestbook'].elements['itemcomment'];
    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;
   }
  else
   {
    document.forms['holdguestbook'].elements['itemcomment'].value += what;
   }
 }