function GoTFK() {
if ((document.Form.dnn$ctr3076$ViewEasyLogin$txtUsername.value > 100000) && (document.Form.dnn$ctr3076$ViewEasyLogin$txtUsername.value < 300000)) {
	document.Form.dnn$ctr3076$ViewEasyLogin$txtUsername.value = document.Form.dnn$ctr3076$ViewEasyLogin$txtUsername.value + "_FietsFit";
}

}