56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
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function defined(x) {
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return x !== null && typeof x !== 'undefined';
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}
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function getById(id) { return document.getElementById(id); }
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function setImage(src, href, cw) {
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let mainfig = getById('mainfig');
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let mainimg = getById('mainimg');
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let mainlink = getById('mainlink');
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let caption = getById('cw');
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if (defined(caption) && defined(cw)) {
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caption.innerHTML = cw;
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} else if (defined(caption)) {
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mainfig.removeChild(caption);
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} else if (defined(cw)) {
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let newCaption = document.createElement('figcaption');
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newCaption.id = 'cw';
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newCaption.innerHTML = cw;
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newCaption.onclick = openCW;
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mainfig.insertBefore(newCaption, mainlink);
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}
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mainimg.src = src;
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mainlink.href= href;
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}
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function activateButton(button) {
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setImage(button.value, button.dataset.link, button.dataset.warning);
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}
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function openCW() {
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let mainfig = getById('mainfig');
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let caption = getById('cw');
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if (defined(caption)) {
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mainfig.removeChild(caption);
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}
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}
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function setup() {
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for (let button of document.querySelectorAll('#altlist input')) {
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button.onchange = function(e) {
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if (button.checked) activateButton(button);
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};
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}
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let caption = getById('cw');
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if (defined(caption)) {
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caption.onclick = openCW;
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}
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}
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window.onload = setup;
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