function insert(){
if (( navigator.userAgent.indexOf('Opera' ) != -1) || ( navigator.userAgent.indexOf('Netscape' ) != -1) || ( navigator.userAgent.indexOf('Firefox' ) != -1)){
text_before = document.guestbook.text.value;
text_after = '';
} 
else {
document.guestbook.text.focus();
var split = document.selection.createRange();
split.collapse();
var split_before = split.duplicate();
var split_after = split.duplicate();
split.moveToElementText(document.guestbook.text);
split_before.setEndPoint('StartToStart',split);
split_after.setEndPoint('EndToEnd',split);
text_before = split_before.text;
text_after = split_after.text;
if(text_before == '') 
{
text_before = text_after;
text_after = '';
}
}
}

function smile(Zeichen)
{
insert();
document.guestbook.text.value = text_before + Zeichen + text_after;
document.guestbook.text.focus();
}

function showBookmarkLabel(text) {
	document.getElementById('bookmarkLabel').innerHTML = text;
}