if (document.images) {
	roll_01_on = new Image();				// Roll over Images
	roll_01_on.src ="images/mainmenu01_on.gif";
	roll_02_on = new Image();
	roll_02_on.src ="images/mainmenu02_on.gif";
	roll_03_on = new Image();
	roll_03_on.src ="images/mainmenu03_on.gif";
	roll_04_on = new Image();
	roll_04_on.src ="images/mainmenu04_on.gif";
	roll_05_on = new Image();
	roll_05_on.src ="images/mainmenu05_on.gif";
	roll_06_on = new Image();
	roll_06_on.src ="images/mainmenu06_on.gif";


	



	roll_01_off = new Image();				// Original Images
	roll_01_off.src ="images/mainmenu01_off.gif";
	roll_02_off = new Image();
	roll_02_off.src ="images/mainmenu02_off.gif";
	roll_03_off = new Image();
	roll_03_off.src ="images/mainmenu03_off.gif";
	roll_04_off = new Image();
	roll_04_off.src ="images/mainmenu04_off.gif";
	roll_05_off = new Image();
	roll_05_off.src ="images/mainmenu05_off.gif";
	roll_06_off = new Image();
	roll_06_off.src ="images/mainmenu06_off.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");
	}
}