if (document.images) {            // Active Images
            img1on = new Image();      
            img1on.src = "http://business.usi.edu/images/buttons/downloadchecksheet_over.gif";

            img1off = new Image(); 
            img1off.src = "http://business.usi.edu/images//buttons/downloadchecksheet.gif";

            img2on = new Image();      
            img2on.src = "http://business.usi.edu/images/buttons/downloadchecksheet_over.gif";

            img2off = new Image(); 
            img2off.src = "http://business.usi.edu/images//buttons/downloadchecksheet.gif";
			
            img20on = new Image();      
            img20on.src = "http://business.usi.edu/images/buttons/ucc_chksheet_red.gif";

            img20off = new Image(); 
            img20off.src = "http://business.usi.edu/images/buttons/ucc_chksheet.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");
        }
}