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I have resolved, by more luck than judgement, the error. I moved the preload css images code further up the page. That is, BEFORE the addition of the eStore JavaScript code in the page. No idea why it worked but the error did not occur. The preload css images code is now BEFORE any WP plugin code.
Thanks for your help.
Thank you for the information. This has provided some useful data. I have disabled the eStore and the error does not show up. There are no JavaScript errors on the page. It is only AFTER the eStore is enabled that the error appears.
The error seems to be that $ is undefined. It comes from this code
<script type=”text/javascript”>
$(document).ready(function(){
//Run the script to preload images from CSS
$.preloadCssImages();
});
</script>
where is think that the $ in $.preloadCssImages(); is wrong.
I have no experience in debugging JavaScript or writing it so am struggling to sort this one out. Do I need to preload CSS Images? What is the purpose? Is it important?
Thanks for any further help you can give.