在尝试在线解决方案后未选择文件时，我尝试禁用提交按钮。这与脚本类型有关吗？
这是我遵循的示例:disable submit button until file selected for upload
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js">
$(document).ready(
function(){
$('input:submit').attr('disabled',true);
$('input:file').change(
function(){
if ($(this).val()){
$('input:submit').removeAttr('disabled');
}
else {
$('input:submit').attr('disabled',true);
}
});
});
</script>
</head>
<body>
<form action="#" method="post">
<input type="file" name="fileInput" id="fileInput" />
<input type="submit" value="submit" disabled />
</form>
</body>
</html>
最佳答案
尝试使用声明的Jquery，因为不包含Jquery:
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-2.0.0.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script type="text/javascript">
$(document).ready(
function(){
$('input:submit').attr('disabled',true);
$('input:file').change(
function(){
if ($(this).val()){
$('input:submit').removeAttr('disabled');
}
else {
$('input:submit').attr('disabled',true);
}
});
});
</script>
</head>
<body>
<form action="#" method="post">
<input type="file" name="fileInput" id="fileInput" />
<input type="submit" value="submit" disabled />
</form>
</body>
</html>