Ajax按钮启用/禁用
问题描述：
How do I enable and Disable the button with AJAX get error admin.php:15 Uncaught ReferenceError: $ is not defined
function validate() {
// Find the validation image div
var validationElement = document.getElementById('nameValidation');
// Get the form values
var password1 = document.forms["Admin"]["password1"].value;
var password2 = document.forms["Admin"]["password2"].value;
// Reset the validation element styles
validationElement.style.display = 'none';
validationElement.className = 'validation-image';
// Check if password2 isn't null or undefined or empty
$('#savepasswd').prop('disabled', true);
if (password2) {
// Show the validation element
validationElement.style.display = 'inline-block';
// Choose which class to add to the element
$('#savepasswd').removeAttr('disabled');
validationElement.className +=
(password1 == password2 ? ' validation-success' : ' validation-error');
}
}
PHP code.
$msg .= " <td><input type=\"submit\" name=\"savepasswd\" id=\"savepasswd\" value=\"Save Access\" class=\"inputadmin\"></td>
";
如何使用AJAX启用和禁用按钮get error admin.php：15未捕获的ReferenceError：$未定义 p>
function validate（）{
//找到验证图像div
var validationElement = document.getElementById（'nameValidation'）;
//获取表单值
var password1 = document.forms [“Admin”] [“password1”]。value;
var password2 = document.forms [“Admin”] [“password2”]。value;
//重置验证元素 styles
validationElement.style.display ='none';
validationclement.className ='validation-image';
//检查password2是否为null或未定义或为空
$（'＃savepasswd' ）.prop（'disabled'，true）;
if（password2）{
//显示验证元素
validationElement.style.display ='inline-block';
//选择要添加到的类 元素
$（'＃savepasswd'）。removeAttr（'disabled'）;
validationElement.className + =
（password1 == password2？ 'validation-success'：'validation-error'）;
}
}
code> pre>
PHP代码。 p>
$ msg。=“＆lt; td＆gt;＆lt; input type = \”submit \“name = \”savepasswd \“id = \”savepasswd \“value = \ “保存访问权限”class = \“inputadmin \”＆gt;＆lt; / td＆gt;
“;
code> pre>
div>
答
You apparently don't have jQuery loaded. You don't need it just for this, you can use plain Javascript.
To disable the button:
document.getElementById('savepasswd').disabled = true;
To enable the button:
document.getElementById('savepasswd').disabled = false;