// Various Javascript/DHTML utility functions.
// Created by Berk Ozer.

// Toggles visibility of element in page.
// The layout does not change when the element becomes invisible.
function toggleVisibility( element_id )
{
    var the_element = document.getElementById( element_id );
    if ( the_element.style.visibility == "visible" )
    {
        the_element.style.visibility = "hidden";
    }
    else
    {
        the_element.style.visibility = "visible";
    }
}

// Toggles presence of element in page.
// The layout is collapsed when the element is not displayed.
function toggleDisplay( element_id )
{
    var the_element = document.getElementById( element_id );
    if ( the_element.style.display == "inline" )
    {
        the_element.style.display = "none";
    }
    else
    {
        the_element.style.display = "inline";
    }
}