function newImage(arg) {
        if (document.images) {
                rslt = new Image();
                rslt.src = arg;
                return rslt;
        }
}

var backColor = new Array();
backColor[0] = '#79abd4';
backColor[1] = '#38424b';
backColor[2] = '#b26033';
backColor[3] = '#8db286';

function changeImages() {
        if (document.images && (preloadFlag == true)) {
                for (var i=0; i<changeImages.arguments.length; i+=3) {
                        color = changeImages.arguments[2];                        document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
                        setTimeout("document.bgColor = backColor[color]", 0);
                }
        }
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
                tgd4_01_ImageMap_01_over = newImage("images/tgd4_01-ImageMap_01_over.png");
                tgd4_01_ImageMap_02_over = newImage("images/tgd4_01-ImageMap_02_over.png");
                tgd4_01_ImageMap_03_over = newImage("images/tgd4_01-ImageMap_03_over.png");
                tgd4_01_ImageMap_04_over = newImage("images/tgd4_01-ImageMap_04_over.png");
		preloadFlag = true;
	}
}