JS 选中页面中所有复选框

getElementsByTagName.js

ss = document.getElementsByTagName('select');
for (var i = 0; i < ss.length; i++) {
  var se = ss[i];
  for (var j = 0; j < se.options.length; j++) {
    if(se.options[j].text=='只读'){
      se.options[j].selected = true;
    }
  }
}

// 选中页面中所有复选框
ss = document.getElementsByTagName('input');
for (var i = 0; i < ss.length; i++) {
  var se = ss[i];
  se.checked = false;
}