// switch scroll images

function switchImage(){

    var currentImg = getElementbyId(scrolls);
     var scrolls = newArray();
     
     scrolls[0]="images/Original-Scrolls.jpg";
     scrolls[1]="images/ScrollPlaceholder.gif";
     
     if( currentImg == scrolls[0]) {
        document.write (scrolls[1]);
     else
        document.write (scrolls[0];
     }