if (document.images) {
	var img = new Array();
	//enter images into the array
	img[0] = 'images/md_logo_bw.gif';
	img[1] = 'images/md_logo_color.gif';
	img[2] = 'images/mpower_logo_bw.gif';
	img[3] = 'images/mpower_logo_color.gif';
	img[4] = 'images/staff_logo_bw.gif';
	img[5] = 'images/staff_logo_color.gif';
	img[6] = 'images/jm_logo_bw.gif';
	img[7] = 'images/jm_logo_color.gif';
	img[8] = 'images/md_logo_color.jpg';
	img[9] = 'images/md_logo_bw2.gif';
	img[10] = 'images/mpower_logo_color.jpg';
	img[11] = 'images/mpower_logo_bw2.jpg';
	img[12] = 'images/staff_logo_color.jpg';
	img[13] = 'images/staff_logo_bw.jpg';
	img[14] = 'images/jm_logo_color.jpg';
	img[15] = 'images/jm_logo_bw.jpg';
	
	var im = new Array();
	
	for (var i = 0; i < img.length; i++) {
		im[i] = new Image();
		im[i].src = img[i];	
	}
}

function toggleImg(imageName, num) {
	if (document.images) {
		document.images[imageName].src = im[num].src;
	}
}

function resolution() {
		document.write("<input name='screenresolution' type='hidden' value='" + screen.width + "x" + screen.height + "' />");
	}
	
function popup(thename) {
		window.open(thename, "", "width=550, height=400,scrollbars=0");
	}