function GetSelectedText()

Ok i create this function in fck_actions.js after
function GetClipboardHTML() >>>

function GetClipboardText()
{
var str_text = '';
var oSelection = objContent.DOM.selection ;
var oTextRange = oSelection.createRange() ;

if (oTextRange.text.substr(oTextRange.text.length-1) == ' ')
str_text = oTextRange.text.substr(0,oTextRange.text.lastIndexOf(' '));
else str_text = oTextRange.text;

return str_text
}