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) {
        supplies_on = newImage("App_Themes/kennedy_home/images/supplies_on.jpg");
	    furniture_on = newImage("App_Themes/kennedy_home/images/furniture_on.jpg");
	    breakroom_on = newImage("App_Themes/kennedy_home/images/breakroom_on.jpg");
	    janitorial_on = newImage("App_Themes/kennedy_home/images/janitorial_on.jpg");
	    technology_on = newImage("App_Themes/kennedy_home/images/technology_on.jpg");
	    preloadFlag = true;
    }
}