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下拉列表具有相同的选项和值，我想在另一个下拉列表中禁用在一个下拉列表中选择的值。
这是我的HTML代码：
<select>所以，当我在发件人中选择A（1），它在Receiver中被禁用，因此用户无法选择该表单中的同一个人（因为它没有意义）。
答案 0 :(得分：0)
使用jQuery，您可以在任何表单（独立）更改时调用函数，然后允许启用除在另一个<span>Sender:</span>
<select required name="Sender">
<option selected disabled value="Select one">Select one</option>
<option value="1">A</option>
<option value="2">B</option>
<option value="3">C</option>
<option value="4">D</option>
<option value="5">E</option>
</select>
<span>Receiver:</span>
<select required name="Receiver">
<option selected disabled value="Select one">Select one</option>
<option value="1">A</option>
<option value="2">B</option>
<option value="3">C</option>
<option value="4">D</option>
<option value="5">E</option>
</select>
下拉列表中选择的选项之外的所有选项。请记住，我们还必须重新启用以前禁用的选项。
<select>// When the user selects an option in "Sender" dropdown selection, this function disables in the "Receiver" dropdown selection the person selected in the other dropdown
$('[name="Sender"]').change(function () {
console.log("Sender changed to value "+this.value+"!");
$('[name="Receiver"]>option').removeAttr("disabled");
$('[name="Receiver"]>option[value="Select one"]').attr("disabled","disabled");
$('[name="Receiver"]>option[value="'+this.value+'"]').attr("disabled","disabled");
});
// When the user selects an option in "Receiver" dropdown selection, this function disables in the "Sender" dropdown selection the person selected in the other dropdown
$('[name="Receiver"]').change(function () {
console.log("Receiver changed to value "+this.value+"!");
$('[name="Sender"]>option').removeAttr("disabled");
$('[name="Sender"]>option[value="Select one"]').attr("disabled","disabled");
$('[name="Sender"]>option[value="'+this.value+'"]').attr("disabled","disabled");
});