function rollon(imgName) {

        imgOn = eval(imgName + "on.src");
        document[imgName].src = imgOn;
        
}
function rolloff(imgName) {

        document[imgName].src = eval(imgName + "off.src");
		
}

// functions for the sidebar

function imgover(imgname){
imgname.src = "../images/ARROW.GIF"
}
function imgout(imgname){
imgname.src = "../images/blank.gif"
}