Unwanted text display at page load

We have a number of courses which use standard graphic backgrounds. When we run these on the internet or through and LMS (Netg), on the first visit to the page, all the text elements for the page appear, then disappear, then the background loads and then the relevant graphics and text for the start of the page load.How can I prevent this unwanted appearance of all the text elements at the start of the page?Colin

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