function tiklaTemizle(alan_adi, varsayilan_deger) {
        if (alan_adi.value == varsayilan_deger) {
            alan_adi.value = "";
        }
    }
    function tiklaGeriYaz(alan_adi, varsayilan_deger) {
        if (alan_adi.value == "") {
            alan_adi.value = varsayilan_deger;
        }
    }
	
	function uyeGirisKontrol(){
		return false;
	}