var maxNumTabs = 0;
function showTab(showDivId) {
    if (document.getElementById('tabs_dropdown')) {
        visibilityoff('tabs_dropdown');
    }
    showTabNumber(showDivId);
}
function showTabNumber(showDivId) {
    var z = 1;
    var divName = "t_div";
    var navlia = "nv";
    while (z <= maxNumTabs) {
        if (divName + z != showDivId) {
            if (document.getElementById(divName + z)) {
               document.getElementById(divName + z).style.display="none";
               if ( (z <= 6) || ((z==7) && (maxNumTabs==7)) ) {
                  if (document.getElementById(navlia + z)) {
                     document.getElementById(navlia + z).className="";
                     document.getElementById("tab" + z).className="prod_tab";
                  }
               }
            }
        }
        z++;
    }
    document.getElementById(divName + showDivId).style.display="inline";
    if ( (showDivId <= 6) || ((showDivId==7) && (maxNumTabs==7)) ) {
       if (document.getElementById(navlia + showDivId)) {
          document.getElementById(navlia + showDivId).className="hv";
          document.getElementById("tab" + showDivId).className="prod_tab_current";
       }
    }
    //Show the description box image only if on first 'description' tab
    if (showDivId > 1) {
        document.getElementById("tabs_content_img_div").style.display="none";
    }
    else {
        document.getElementById("tabs_content_img_div").style.display="inline";
    }
}
function visibility(thingId) {
    var targetElement;
    targetElement = document.getElementById(thingId) ;
    if (targetElement.style.display == "none") {
        targetElement.style.display = "" ;
    } 
    else {
        targetElement.style.display = "none" ;
    }
}
function visibilityon(thingId) {
    var targetElement;
    targetElement = document.getElementById(thingId) ;
    if (thingId == 'tabs_dropdown') {document.getElementById('tab_dropdown_more').className='extra_tabs_tab_selected';}
    targetElement.style.display = "" ;
}
function visibilityoff(thingId) {
    var targetElement;
    targetElement = document.getElementById(thingId) ;
    if (thingId == 'tabs_dropdown') {document.getElementById('tab_dropdown_more').className='extra_tabs_tab';}
    targetElement.style.display = "none" ;
}