Thank you for your reply.
I changed my CSS from
background: url(images/stripe.png) repeat;
and opened it locally as an HTML file and then online. There was no change at all - the stripe.png still did not load.
background: url(./images/stripe.png) repeat;
I then changed my CSS to:
and again tried to open it locally - and then online - but still no change: no background image loaded.
background: url("./images/stripe.png") repeat;
I tried both with IE10 and Safari.