if (document.images){
	Book1On = new Image();
	Book1On.src = "/images/sidemenu_01_rollover.gif";
	Book1Off = new Image();
	Book1Off.src = "/images/sidemenu_01.gif";
	
	JournalOn = new Image();
	JournalOn.src = "/images/journal_rollover.gif";
	JournalOff = new Image();
	JournalOff.src = "/images/journal_01.gif";

	AboutOn = new Image();
	AboutOn.src = "/images/sidemenu_04_rollover.gif";
	AboutOff = new Image();
	AboutOff.src = "/images/sidemenu_04.gif";
}
	
	
	
// Function to 'activate' images.
function imgOn(imgName) {

        if (document.images) {

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

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "Off.src");
        }
}