function setContentPage()
{
    //set content in iframe
    $('content').src = 'content/'+_page + '.htm';
    //set left nav image selection    
    $('sn_'+_page).style.backgroundColor = '#FFCC66';
    $('sn_'+_page).firstChild.firstChild.style.color = 'black';//'#666666'; //'#666666';
    $('sn_'+_page).firstChild.firstChild.style.fontWeight = 'bold'; //'#666666';
    $('snimg').src = 'photos/sidenav_'+_page+'.jpg';
    if ( $('lnk_snimg') != null )
    {
        $('lnk_snimg').href = getSideNavImageURL();
    }
     //set toolbar selection    
    if ( _section != '{NONE}' )
    {
        $('tb_'+_section).src = $('tb_'+_section).src.replace('_OFF','_ON');    
        $('tb_'+_section).onmouseover = '';
        $('tb_'+_section).onmouseout = '';
    }
    else
    {
        $('lnk_'+_page).style.fontWeight = 'bold';
    }
}

function navigateToSection( theSection )
{
    //turn the section image 'off', so the section won't be highlighted if browser back button is clicked
    //to return to the current page 
    $('tb_'+theSection).src = $('tb_'+ theSection).src.replace('_ON','_OFF');
    document.location.href = theSection + '.htm';
}

function navigateToContentPage( thePage )
{
    //reset current page navigation
    $('sn_'+_page).style.backgroundColor = 'white';    
    $('sn_'+_page).firstChild.firstChild.style.color = $('sn_'+thePage).firstChild.firstChild.style.color;
    $('sn_'+_page).firstChild.firstChild.style.fontWeight = '';
    $('sn_'+_page).onmouseover = $('sn_'+thePage).onmouseover;
    $('sn_'+_page).onmouseout = $('sn_'+thePage).onmouseout;
    //set new page as current page
    _page = thePage;
    setContentPage();   
}

function swap_menu_image(obj)
{
    
    if (obj.src.indexOf('_OFF') > 1 )
    {
        obj.src = obj.src.replace('_OFF', '_ON');
    }
    else
    {
        obj.src = obj.src.replace('_ON', '_OFF');
    }    
    return true;
}

//window.setInterval("swap_menu_image($('tb_lowerschool'));", 1000);
//window.setInterval("swap_menu_image($('tb_middleschool'));", 3000);
//window.setInterval("swap_menu_image($('tb_upperschool'));", 6000);
//var middle_school_swap;
//var upper_school_swap;




//
// Returns the URL to visit upon click of the side navigation image
//
function getSideNavImageURL()
{
    var aURL = '';
    switch ( _page )
    {
        case 'multipleintelligences':
            aURL = 'http://www.amazon.com/gp/product/0465025102?ie=UTF8&tag=sparhawkschoo-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=0465025102';
            break;
        case "coursecatalog": 
            aURL = 'content/pdf/currentcatalog.pdf';
            break;
        default:
            aURL = '#';
            break;            
    }
    return aURL;
}