28 lines
801 B
JavaScript
28 lines
801 B
JavaScript
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function moveUp(selectId) {
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var selectList = document.getElementById(selectId);
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var selectOptions = selectList.getElementsByTagName('option');
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for (var i = 1; i < selectOptions.length; i++) {
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var opt = selectOptions[i];
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if (opt.selected) {
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selectList.removeChild(opt);
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selectList.insertBefore(opt, selectOptions[i - 1]);
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}
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}
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}
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function moveDown(selectId) {
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var selectList = document.getElementById(selectId);
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var selectOptions = selectList.getElementsByTagName('option');
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for (var i = selectOptions.length - 2; i >= 0; i--) {
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var opt = selectOptions[i];
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if (opt.selected) {
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var nextOpt = selectOptions[i + 1];
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opt = selectList.removeChild(opt);
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nextOpt = selectList.replaceChild(opt, nextOpt);
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selectList.insertBefore(nextOpt, opt);
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}
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}
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}
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