function newImage(arg) {
        if (document.images) {
               rslt = new Image();
               rslt.src = arg;
               return rslt;
        }
}
 
function changeImages() {
        if (document.images && (preloadFlag == true)) {
               for (var i=0; i<changeImages.arguments.length; i+=2) {
                       document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
               }
        }
}
 
var preloadFlag = false;
function preloadImages() {

        if (document.images) {
               imagemap_01_Imagemap_01_over = newImage("/images/imagemap_01-Imagemap_01_over.jpg");
               imagemap_01_Imagemap_02_over = newImage("/images/imagemap_01-Imagemap_02_over.jpg");
               imagemap_01_Imagemap_03_over = newImage("/images/imagemap_01-Imagemap_03_over.jpg");
               preloadFlag = true;
               
        }
}