英文:
with password validification javascript and html form
问题
我正在尝试编写一个简单的任务。
我需要从HTML表单中获取密码，并检查是否包含数字和字母，并且密码不超过10个字母或不少于4个。
所以我写了一些（可能很糟糕）并且它不起作用（出奇不意 xD）。
无论如何，这是我的代码。
function checkpassword(checked_id, error_id, err_color){
var upperCaseLetters = /[A-Z]/g;
var lowerCaseLetters = /[a-z]/g;
var numbers = /[0-9]/g;
element_checked = document.getElementById(checked_id);
element_error = document.getElementById(error_id);
element_error.style.color = err_color;
if (!checked_id.value.match(upperCaseLetters) && !checked_id.value.match(lowerCaseLetters)) {
element_checked.style.backgroundColor = err_color;
element_error.innerHTML = "请输入字母";
return false;
}
else if(!checked_id.value.match(numbers))
{
element_checked.style.backgroundColor = err_color;
element_error.innerHTML = "请输入数字";
return false;
}
return true;
}
英文:
Im trying to code a simple task.
i need to get a password from html form, and check if there is both numbers and letters there, and that the password is not longer then 10 letters or short then 4.
so i wrote something (probably terrible) and its not working (surprisingly xD).
anyways, heres my code.
function checkpassword(checked_id, error_id, err_color){
var upperCaseLetters = /[A-Z]/g;
var lowerCaseLetters = /[a-z]/g;
var numbers = /[0-9]/g;
element_checked = document.getElementById(checked_id);
element_error = document.getElementById(error_id);
element_error.style.color = err_color;
if (!checked_id.value.match(upperCaseLetters) && !checked_id.value.match(lowerCaseLetters)) {
element_checked.style.backgroundColor = err_color;
element_error.innerHTML = "enter letters";
return false;
}
else if(!checked_id.value.match(numbers))
{
element_checked.style.backgroundColor = err_color;
element_error.innerHTML = "Enter numbers";
return false;
}
return true;
}
答案1
得分: 1
主要问题是您使用了 checked_id.value，应该是 element_checked.value。
此外，一般建议使用 let 创建变量，而不是 var，如果您不需要它们成为全局变量。
英文:
The primary issue is that you used checked_id.value, which should be element_checked.value.
Also, generally it's advisable to create variables with let instead of var if you don't need them to be global.
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