function initialize_radiobutton() {

	var radiobutton_value = Form.getInputs('send_form','radio','document_to_send').find(function(radio) { return radio.checked; }).value;

if(radiobutton_value == "text") {
	
	enableTextarea();

}
else if(radiobutton_value == "file") {
	
	enableFilearea();

}
	
	
}