~我需要禁用2复选框时，第三个复选框被选中

JavaScript ~ I need to disable 2 checkboxes when the 3rd checkbox is selected

本文关键字：复选框 三个      更新时间：2023-09-26

我需要checkBox 3来禁用checkBox 1 &2当它被选中。当我在第三个复选框标签中有onClick时，代码工作，但我的首席程序员希望在上面的JavaScript代码中有onClick。我对JS不太好，所以我不知道为什么它不起作用。这是我目前所看到的:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Content-Script-Type" content="text/javascript">
<meta name="Content-Style-Type" content="text/css">
<title>Example</title>
<SCRIPT TYPE="text/javascript">
<!--
var field = document.getElementById("check_1157");
if (field)
{
  function update1157Box(contactMethod)
  {
    var contactMethod = document.getElementById("check_1157");
    if(contactMethod.check_1157.checked)
    {
      //enable the not to receive information
      contactMethod.check_1156.disabled =true;
      contactMethod.check_1156.checked = false;
      contactMethod.check_1158.disabled =true;
      contactMethod.check_1158.checked = false;
      return;
    }
  }
  field.onClick = update1157Box(this.form)
  //the not to receive information
  contactMethod.check_1156.checked = false;
  contactMethod.check_1156.disabled = false;
  contactMethod.check_1158.checked = false;
  contactMethod.check_1158.disabled = false;
}
//-->
</SCRIPT>
</head>
<body>
<form>
  <div class="many-from-many">
    <label style="display: block;"><input id="check_1156"
     name="answerswers[166][]" value="1156" type="checkbox">Check Box 1</label>
    <label style="display: block;"><input id="check_1158"
     name="answerswers[166][]" value="1158" type="checkbox"> Check Box 2</label>
    <label style="display: block;"><input id="check_1157"
     name="answerswers[166][]" value="1157" type="checkbox">Check Box 3</label>
  </div>
</form>
</body>
</html>

jQuery让事件处理变得很简单:

$('#check_1157').click(function() {
    if ($(this).prop('checked')) {
        $('#check_1156, #check_1158').prop({
            checked: false,
            disabled: true
        });
    } else {
        $('#check_1156, #check_1158').prop({disabled: false});
    }
});

我的方法反对费边的，我会做这样的事情，因为你有一个div周围的三个复选框块称为多从多这将寻找(父<lable>)节点(父<DIV>)的第三个复选框，然后找到childNodes(复选框)

<form>
  <div class="many-from-many"><label style="display: block;"><input id="check_1156"name="answerswers[166][]" value="1156" type="checkbox">Check Box 1</label><label style="display: block;"><input id="check_1158"name="answerswers[166][]" value="1158" type="checkbox">Check Box 2</label><label style="display: block;"><input id="check_1157"name="answerswers[166][]" value="1157" type="checkbox" onclick="togTopTwo(this)">Check Box 3</label></div>
</form>

. 

 function togTopTwo(c){
    var mm = c.parentNode.parentNode;
    var xx = mm.firstChild.firstChild;
    var secondOfMany = xx.parentNode.nextSibling.firstChild;
    if(c.checked){
       xx.disabled=true;
       secondOfMany.disabled = true;
   }else{
       xx.disabled=false;
       secondOfMany.disabled =false;
   }
 }

Eric的解决方案是使用jQuery，这里有一个纯JavaScript替代方案:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Content-Script-Type" content="text/javascript">
<meta name="Content-Style-Type" content="text/css">
<title>Example</title>
<SCRIPT TYPE="text/javascript">
<!--
var toggle_list = ['check_1156', 'check_1158'];

function toggle(checkbox) {
    if (checkbox.disabled) {
        checkbox.removeAttribute('disabled');
    } else {
        checkbox.setAttribute('disabled', true);
    }
}
function toggleActivation() {
    for (var i=0; i<toggle_list.length; i++) {
        var id = toggle_list[i];
        var checkbox = document.getElementById(id);
        toggle(checkbox);
    }
}
//-->
</SCRIPT>
</head>
<body>
<form>
  <div class="many-from-many">
    <label style="display: block;"><input id="check_1156"
     name="answerswers[166][]" value="1156" type="checkbox">Check Box 1</label>
    <label style="display: block;"><input id="check_1158"
     name="answerswers[166][]" value="1158" type="checkbox"> Check Box 2</label>
    <label style="display: block;"><input id="check_1157"
     name="answerswers[166][]" value="1157" type="checkbox" onchange="toggleActivation()">Check Box 3</label>
  </div>
</form>
</body>
</html>

这可能不是IE安全，因为我目前正在运行Linux。如果在IE中不起作用，则问题出在toggle函数内部。

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