Update imageviewer.js
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@ -51,14 +51,7 @@ function modalImageSwitch(offset) {
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var galleryButtons = all_gallery_buttons();
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if (galleryButtons.length > 1) {
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var currentButton = selected_gallery_button();
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var result = -1;
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galleryButtons.forEach(function(v, i) {
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if (v == currentButton) {
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result = i;
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}
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});
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var result = selected_gallery_index();
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if (result != -1) {
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var nextButton = galleryButtons[negmod((result + offset), galleryButtons.length)];
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