function SetNavLayer(el, pre){
    var imgPlus = new Image();
    imgPlus.src = "http://files.onveon.com/repository/image/t1_plus.gif";
    var imgMinus = new Image();
    imgMinus.src = "http://files.onveon.com/repository/image/t1_minus.gif";
    var state = document.getElementById(el).style.display;
    var divArray = document.getElementsByTagName('div');
    for (var i = 0; i < divArray.length; i++){
        if(divArray[i].id.split("-")[0]=="dv"){
            divArray[i].style.display="none";
        }
    }
    document.getElementById(el).style.display="block";
    if(state=="block"){
        document.getElementById(el).style.display="none";
    }
    else{
        document.getElementById(el).style.display="block";
    }
    var aArray = document.getElementsByTagName('img');
    for (var i = 0; i < aArray.length; i++){
       if(aArray[i].id.split("_")[0]==pre && aArray[i].id != pre+"_"+el){
        aArray[i].src=imgPlus.src;
       }
    }
    if(document.getElementById(pre+"_"+el).src==imgMinus.src){
        document.getElementById(pre+"_"+el).src=imgPlus.src;
    }
    else{
        document.getElementById(pre+"_"+el).src=imgMinus.src;
    }
}

    var imgByProgramF1 = new Image();
    imgByProgramF1.src = "http://files.onveon.com/repository/image/Tab_BrowseByProgram.gif";
    var imgByProgramF2 = new Image();
    imgByProgramF2.src = "http://files.onveon.com/repository/image/Tab_BrowseByProgram_f2.gif";
    var imgByCareerF1 = new Image();
    imgByCareerF1.src = "http://files.onveon.com/repository/image/Tab_BrowseCareers.gif";
    var imgByCareerF2 = new Image();
    imgByCareerF2.src = "http://files.onveon.com/repository/image/Tab_BrowseCareers_f2.gif";

function SetVideoNavBar(el){
    switch(el){
        case "VidNavProgram":
            document.getElementById("VidNavProgram").src = imgByProgramF2.src;
            document.getElementById("VidNavAll").src = imgByCareerF1.src;
            document.getElementById("NavProg").style.display="none";
            document.getElementById("NavAll").style.display="block";
        break;
        case "VidNavAll":
            document.getElementById("VidNavProgram").src = imgByProgramF1.src;
            document.getElementById("VidNavAll").src = imgByCareerF2.src;
            document.getElementById("NavProg").style.display="block";
            document.getElementById("NavAll").style.display="none";
        break;
    }
}