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Hi,

When a user clicks "Add To Basket" I need some javascript to check that the size option they have selected is not "-" in the form before the actual form is submitted.

My form is like so:
...

oh, forgot to say I changed the javascript slightly to match the div id



var thumbs = document.getElementById('additionalimages').getElementsByTagName('img');
var fullsize =...

I'm probably being a complete idiot here, because that all looks very simple, but can you see where I've gone wrong? All my javascript is the same as you posted, copied exactly.

Here's my HTML...

Hi there,

I have a page which has four images on it, one large with three below.

I basically just need a piece of script which changes the large image to whichever small one is clicked.

I...