// Replaces the currently selected text with the passed text.
function addText(instext, textarea) {
	var mess = textarea;
	
	//IE support
	if (document.selection) {
	    mess.focus();
	    sel = document.selection.createRange();
	    sel.text = instext;
	    document.form.focus();
	}
	//MOZILLA/NETSCAPE support
	else if (mess.selectionStart || mess.selectionStart == "0") {
	    var startPos = mess.selectionStart;
	    var endPos = mess.selectionEnd;
	    var chaine = mess.value;
	
	    mess.value = chaine.substring(0, startPos) + instext + chaine.substring(endPos, chaine.length);
	
	    mess.selectionStart = startPos + instext.length;
	    mess.selectionEnd = endPos + instext.length;
	    mess.focus();
	} else {
	    mess.value += instext;
	    mess.focus();
	}
}

// Surrounds the selected text with text1 and text2.
function surroundText(text1, text2, textarea)
{
	// Can a text range be created?
	if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange)
	{
		var caretPos = textarea.caretPos, temp_length = caretPos.text.length;

		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text1 + caretPos.text + text2 + ' ' : text1 + caretPos.text + text2;

		if (temp_length == 0)
		{
			caretPos.moveStart("character", -text2.length);
			caretPos.moveEnd("character", -text2.length);
			caretPos.select();
		}
		else
			textarea.focus(caretPos);
	}
	// Mozilla text range wrap.
	else if (typeof(textarea.selectionStart) != "undefined")
	{
		var begin = textarea.value.substr(0, textarea.selectionStart);
		var selection = textarea.value.substr(textarea.selectionStart, textarea.selectionEnd - textarea.selectionStart);
		var end = textarea.value.substr(textarea.selectionEnd);
		var newCursorPos = textarea.selectionStart;
		var scrollPos = textarea.scrollTop;

		textarea.value = begin + text1 + selection + text2 + end;

		if (textarea.setSelectionRange)
		{
			if (selection.length == 0)
				textarea.setSelectionRange(newCursorPos + text1.length, newCursorPos + text1.length);
			else
				textarea.setSelectionRange(newCursorPos, newCursorPos + text1.length + selection.length + text2.length);
			textarea.focus();
		}
		textarea.scrollTop = scrollPos;
	}
	// Just put them on the end, then.
	else
	{
		textarea.value += text1 + text2;
		textarea.focus(textarea.value.length - 1);
	}
}