// The following code was programmed by Joel Dixon and Belinda Cecere of Ladybug Web Design,  2005

var prefix = ["inde", "abou", "week", "bbql", "pupp", "soci", "prob", "syst", "semi", "serv", "test", "cont"];
var rightPrefix = ["ccsm", "adtsm", "abksm", "bsfdsm", "acpsm"];

// The following code pre-loads all images for the menu bar, to ensure mouse-over changes look seemless

if (document.images)
{
    var norm = new Array();
    var over = new Array();
    var curr = new Array();


    for (i = 0; i < prefix.length; i++)
    {
        norm[i] = new Image();
        norm[i].src = "./images/" + prefix[i] + "norm.gif";
        over[i] = new Image();
        over[i].src = "./images/" + prefix[i] + "over.gif";
        curr[i] = new Image();
        curr[i].src = "./images/" + prefix[i] + "curr.gif";
    }
    var rightNorm = new Array();
    var rightOver = new Array();

    for (i = 0; i < rightPrefix.length; i++)
    {
        rightNorm[i] = new Image();
        rightNorm[i].src = "./images/" + rightPrefix[i] + "norm.jpg";
        rightOver[i] = new Image();
        rightOver[i].src = "./images/" + rightPrefix[i] + "over.jpg";
    }
}

// The following method changes the image of the button the mouse is over

function swapBtn(btnNum, state)
{
    switch (state)
    {
        case 'norm':
            document.images[prefix[btnNum]].src = norm[btnNum].src;
            break;
        case 'over':
            document.images[prefix[btnNum]].src = over[btnNum].src;
            break;
    }
}

function swapRightBtn(btnNum, state)
{
    switch (state)
    {
        case 'norm':
            document.images[rightPrefix[btnNum]].src = rightNorm[btnNum].src;
            break;
        case 'over':
            document.images[rightPrefix[btnNum]].src = rightOver[btnNum].src;
            break;
    }
}

function swapBook(state)
{
    switch (state)
    {
        case 'norm':
            document.images.book.src = "./images/booknorm.jpg";
            break;
        case 'over':
            document.images.book.src = "./images/bookover.jpg";
            break;
    }
}