function bbcode(bbdebut, bbfin)
	{
		var input = window.document.formulaire.message;
		input.focus();
		
		if(typeof document.selection != 'undefined')
		{
			var range = document.selection.createRange();
			var insText = range.text;
			range.text = bbdebut + insText + bbfin;
			range = document.selection.createRange();
	
				if (insText.length == 0)
				{
					range.move('character', -bbfin.length);
				}
				else
				{
					range.moveStart('character', bbdebut.length + insText.length + bbfin.length);
				}
			
			range.select();
		}
		else if(typeof input.selectionStart != 'undefined')
		{
			var start = input.selectionStart;
			var end = input.selectionEnd;
			var insText = input.value.substring(start, end);
			input.value = input.value.substr(0, start) + bbdebut + insText + bbfin + input.value.substr(end);
			var pos;
			
				if (insText.length == 0)
				{
					pos = start + bbdebut.length;
				}
				else
				{
					pos = start + bbdebut.length + insText.length + bbfin.length;
				}
				
			input.selectionStart = pos;
			input.selectionEnd = pos;
		}
		else
		{
			var pos;
			var re = new RegExp('^[0-9]{0,3}$');
			
				while(!re.test(pos))
				{
					pos = prompt("insertion (0.." + input.value.length + "):", "0");
				}
				
				if(pos > input.value.length)
				{
					pos = input.value.length;
				}
			
			var insText = prompt("Veuillez taper le texte");
			input.value = input.value.substr(0, pos) + bbdebut + insText + bbfin + input.value.substr(pos);
		}
	}