changeImage = function(newimage) {
        imagevalue = "url(" + newimage + ") no-repeat";
        document.getElementById("pics").style.background = imagevalue;
}

toggleDesc = function(divid) {
        document.getElementById(divid).style.visibility = "visible";
}

hideDesc = function(hidediv) {
        document.getElementById(hidediv).style.visibility = "hidden";
}