有人可以帮我修复我的代码吗？ 我的问题是如何在选择一个投递箱时禁用另一个投递箱？ 我正在使用 PHP 和 JavaScript 编程语言。 我希望任何人都可以帮助我，因为这非常重要。
这是我的代码:
<head>
<script type = "text/javascript">
function disableDrop(){
if(frmMain.sltMain.options[1].selected){
frmMain.sltSecondary.disabled = true;
}
else{
frmMain.sltSecondary.disabled = false;
}
}
</script>
</head>
<form ID = "frmMain">
<select ID = "sltMain" onchange = "disableDrop();">
<option value = "onetime" selected>One-Time</option>
<option value = "recurring">Recurring</option>
</select>
<select ID = "sltMain" onchange = "disableDrop();">
<option value = "onetime">One-Time</option>
<option value = "recurring" selected>Recurring</option>
</select>
</form>
最佳答案
试试这个:Demo
HTML 编码:
<select ID = "sltMain" onchange = "disableDrop(this);">
<option value = "onetime" selected>One-Time</option>
<option value = "recurring">Recurring</option>
</select>
<select ID = "sltSecondary" onchange = "disableDrop1(this);">
<option value = "onetime">One-Time</option>
<option value = "recurring" selected>Recurring</option>
</select>
</form>
JAVASCRIPT:
function disableDrop(elem) {
if(elem.value == 'recurring'){
document.getElementById('sltSecondary').disabled = true;
}
else{
document.getElementById('sltSecondary').disabled = false;
}
}
function disableDrop1(elem) {
if(elem.value == 'onetime'){
document.getElementById('sltMain').disabled = true;
}
else{
document.getElementById('sltMain').disabled = false;
}
}
关于javascript - 如何在php中选择一个时禁用下拉菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28500461/