function showhide(id) {
if (document.getElementById){
obj = document.getElementById(id);
if (obj.style.display == "none"){
obj.style.display = "";
}
}
}

function geo_district(sel) {

var id = document.forms["register"].elements["reg_id"].value;

	//showhide('powiat');
		
    advAJAX.get({
        url: "geoajax/geo_district.php",
        parameters: {
            "id": id
        },
        onSuccess: function(obj){
			document.getElementById("dis_id").innerHTML = obj.responseText;
        },
        onError: function(obj){
            alert("Error: " + obj.status);
        }
    });
};

function geo_comm(sel) {

	var id = document.forms["register"].elements["dis_id"].value;

	//showhide('miasto');
	
    advAJAX.get({
        url: "geoajax/geo_comm.php",
        parameters: {
            "id": id
        },
        onSuccess: function(obj){
			document.getElementById("com_id").innerHTML = obj.responseText;
        },
        onError: function(obj){
            alert("Error: " + obj.status);
        }
    });
};

function checkform(form)
{
    // ** START **
    
    if (form.reg_id.value == "" || form.reg_id.value == 0) {
        alert("Wybierz region");
        form.reg_id.focus();
        return false ;
    }
    
    if (form.dis_id.value == "" || form.dis_id.value == 0) {
        alert("Wybierz powiat");
        form.dis_id.focus();
        return false ;
    }
	
	if (form.com_id.value == "" || form.com_id.value == 0) {
        alert("Wybierz powiat");
        form.com_id.focus();
        return false ;
    }

    // ** END **
    return true;
}