function red(img){
	pic = img.src;
	substr = pic.substring(0, pic.length-4);
	img.src = substr+"-r.jpg"
}


function blue(img){
	pic = img.src;
	substr = pic.substring(0, pic.length-6);
	img.src = substr+".jpg"
}

function showProduct(id) {
  window.open('/product/' + id + '.html?image', '_blank',
    'height=520,left=20,location=0,menubar=0,resizable=1,scrollbars=1,status=0,toolbar=0,top=40,width=560');
}