/* Fonction d'insertion de mise en forme dans les textarea */
	function replaceSelection(input, begin, end)
	{
		if (input.setSelectionRange) {
			var selectionStart = input.selectionStart;
			var selectionEnd = input.selectionEnd;
			var replaceString = begin 
				+ input.value.substring(selectionStart, selectionEnd) 
				+ end;
			input.value = input.value.substring(0, selectionStart) 
				+ replaceString 
				+ input.value.substring(selectionEnd);
		}
		else if (document.selection) {
			var range = document.selection.createRange();
			if (range.parentElement() == input) {
				var isCollapsed = range.text == '';
				var replaceString = begin + range.text + end;
				range.text = replaceString;
				if (!isCollapsed){
					//it apears range.select() should select the newly
					//inserted text but that fails with IE
					range.moveStart('character', - replaceString.length);
					range.select();
				}
			}
		}
	}
	function insertText(txt)
	{
		var area = document.form.newcomment;
		area.focus();
		replaceSelection(area, txt, '');
	}