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JavaScript<script type="text/javascript"><!--function checkValue(fname, cbox, target){var check = document.forms[fname].elements[cbox];var btn = document.forms[fname].elements[target];if (check.checked) {btn.removeAttribute('disabled');}else {btn.setAttribute('disabled', 'disabled');}}//--></script>Form<form id="form1"><input id="check" type="checkbox" onclick="checkValue('form1', 'check', 'btn')"> あれを更新してもいい?<br><br><input id="btn" type="button" value="あれを更新するよ" disabled="disabled"></form>
<h:commandButton type="submit" id="btn" value="次へ" 省略 disabled="disabled" />
JavaScript<script type="text/javascript"><!--function init(){var btn = document.forms['form1'].elements['btn'];btn.disabled = true;}function checkValue(fname, cbox, target){var check = document.forms[fname].elements[cbox];var btn = document.forms[fname].elements[target];if (check.checked) {btn.disabled = false;}else {btn.disabled = true;}}//--></script>Form<form id="form1"><input id="initFlg" type="hidden" value="1"><input id="check" type="checkbox" onclick="checkValue('form1', 'check', 'btn')"> あれを更新してもいい?<br><br><input id="btn" type="button" value="あれを更新するよ"></form>