https://www.nspm.rs/plugins/system/yvbbcode/default.js

1function setSelectionRange(input, selectionStart, selectionEnd) 
2{
3    if (input.createTextRange) 
4    {
5        var range = input.createTextRange();
6        range.collapse(true);
7        range.moveEnd('character', selectionEnd);
8        range.moveStart('character', selectionStart);
9        range.select();
10    }
11    else if (input.setSelectionRange) 
12    {   
13        input.focus();
14        input.setSelectionRange(selectionStart, selectionEnd);
15    }
16}
17
18function yvBBCodeReplaceText(ControlID, tag) 
19{
20	var selStart = 0;
21	
22	var selEnd = 0;
23	
24	if (ControlID.createTextRange) 
25    	{
26		
27		if( document.selection )
28		{
29			// The current selection
30			var range = document.selection.createRange();
31			// We'll use this as a 'dummy'
32			var stored_range = range.duplicate();
33			// Select all text
34			stored_range.moveToElementText( ControlID );
35			// Now move 'dummy' end point to end point of original range
36			stored_range.setEndPoint( 'EndToEnd', range );
37			// Now we can calculate start and end points
38			selStart = stored_range.text.length - range.text.length;
39			selEnd = selStart + range.text.length;
40		}
41
42	}
43	else if (ControlID.setSelectionRange) 
44	{
45		selStart = ControlID.selectionStart;
46		selEnd = ControlID.selectionEnd;
47	}
48
49	var selText = (ControlID.value).substring(selStart, selEnd);
50	var startText = (ControlID.value).substring(0, selStart);
51	var endText = (ControlID.value).substring(selEnd);
52	var taggedText = '[' + tag + ']' + selText +'[/' + tag + ']';
53
54	ControlID.value =  startText + taggedText + endText;
55	setSelectionRange(ControlID, startText.length + tag.length + 2, startText.length + tag.length + 2 + selText.length);
56	ControlID.focus();
57}