如何更改数字输入的格式
[英]How do I change the format of digit inputs
问题描述
Basically, I want to change a person input from 0######### to (0#)########, the event im using is onblur
基本上，我想将一个人的输入从 0######### 更改为 (0#)########，我使用的事件是 onblur
function numberChange(){
var check = document.getElementById("number").value;
var regCheck = /^[0-9]+$/;
if (check != 10 || !regCheck)
{
alert("Please input your 10 digit mobile number")
return false;
}
else if (check == 10 || regCheck)
{
return true;
}
}
2 个解决方案
解决方案1
0 已采纳 2016-03-20 05:09:47
Your regCheck should be ^\\(0\\d\\)\\d{8}$你的regCheck应该是^\\(0\\d\\)\\d{8}$
Update :更新 ：
This regex validates the number of characters, you can omit length check in your code :此正则表达式验证字符数，您可以在代码中省略长度检查：
function numberChange(){
var check = document.getElementById("number").value;
var re = new RegExp(/^\(0\d\)\d{8}$/);
if (re.test(check)) {
return true;
}
else {
alert("Please input your 10 digit mobile number")
return false;
}
}
解决方案2
0 2016-03-20 05:20:35
This will check for 10 digits, first number is zero, and that all inputs are digits.这将检查 10 位数字，第一个数字为零，并且所有输入都是数字。 Once all of that passes the code will add the '(' & ')' to it.一旦所有这些都通过，代码将向其添加 '(' & ')' 。 This approach gives specific errors depending on how the user incorrectly entered the number.这种方法会根据用户错误输入数字的方式给出特定错误。
<html>
<body>
Phone number: <input type="text" id="number" onblur="checkNumber()">
<script>
function checkNumber() {
var x = document.getElementById("number").value;
// Check for 10 digits.
if(x.length != 10) {
alert('The number must be 10 digits.');
return false;
}
// Make sure the first digit is 0.
if(x.charAt(0) != 0) {
alert('The first digit must be 0.');
return false;
}
// Make sure all digits are numbers and not characters.
if(isNaN(x) == true) {
alert('All digits must be numbers.');
return false;
}
// If here then everything else passed so add the '(' and ')' to the number.
document.getElementById("number").value = '(0' + x.charAt(1) + ')' + x.substring(2, 10);
}
</script>
</body>
</html>
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