/**
 * Utility methods to handle layers
 *
 * by Matija Tomaskovic
 * 2004.-19.01.2005.
 */

function showLayer(id, display)
{
    if (!display)
        display = "block";
    document.getElementById(id).style.visibility = "visible";
    if (display != "undefined") {
        document.getElementById(id).style.display = display;
    }

}

function hideLayer(id, display)
{
    if (!display)
        display = "none";
    document.getElementById(id).style.visibility = "hidden";
    if (display != "undefined") {
        document.getElementById(id).style.display = display;
    }
}

function toggleLayer(id, type)
{
    if (!type)
        type = "block";

    var obj = document.getElementById(id);
    if (obj == "undefined") {
        alert("Not found: " + id);
        return;
    }
    var v = obj.style.visibility;
    var d = obj.style.display;
    if (v == "visible") {
        obj.style.visibility = "hidden";
        obj.style.display = "none";
        return false;
    }
    else if (v == "hidden") {
        obj.style.visibility = "visible";
        obj.style.display = type;
        return true;
    }
    else if (d != "none") {
        obj.style.visibility = "hidden";
        obj.style.display = "none";
        return false;
    }
    else {
        obj.style.visibility = "visible";
        obj.style.display = type;
        return true;
    }

}

function toggleLayers(v_id, v_from, v_to)
{
    for (var i=v_from; i <= v_to; i++) {
        toggleLayer(v_id+i);
	}

}

function showLayers(v_id, v_from, v_to)
{
    for (var i=v_from; i <= v_to; i++) {
        showLayer(v_id+i);
	}

}

function hideLayers(v_id, v_from, v_to)
{
    for (var i=v_from; i <= v_to; i++) {
        hideLayer(v_id+i);
	}

}


function deleteLayer(v_id) {
    var v_obj = document.getElementById(v_id);
    v_obj.parentNode.removeChild(v_obj);
    return false;
}


/**
 * @param layer_type    inline
 */
function toggleLayerWithCheckbox(objCheckBox, layer_id, layer_type) {
    if (objCheckBox.checked)
        showLayer(layer_id, layer_type);
    else
        hideLayer(layer_id, "none");
}