Цитировать выделенное в ие8

function addQuoteText(author){
 
    var seltext = '';
 
	if (window.getSelection) {
		var seltext = window.getSelection();
	} else if (document.getSelection) {
		var seltext = document.getSelection();
	} else if (document.selection) {
		var seltext = document.selection.createRange().text;
	}
 
	if (seltext){
		var quote = '[quote='+author+']' + seltext + '[/quote]' + "\n";
		var msg = $('textarea#message').val() + quote;
		$('textarea#message').val(msg);
	}
 
}