javascript 特殊字符验证
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Special character validation
提问by AJJ
I have some javascript written to validate that a string is alphanumeric but i was just wondering how i could add some code to include hyphens(-) and slash's(/) as acceptable inputs. Here is my current code:
我编写了一些 javascript 来验证字符串是否为字母数字，但我只是想知道如何添加一些代码以将连字符 (-) 和斜杠 (/) 作为可接受的输入包含在内。这是我当前的代码：
function validateAddress() {
var address = document.getElementById('address');
if (address.value == "") {
alert("Address must be filled out");
return false;
} else if (document.getElementById('address').value.length > 150) {
alert("Address cannot be more than 150 characters");
return false;
} else if (/[^a-zA-Z0-9\-\/]/.test(address)) {
alert('Address can only contain alphanumeric characters, hyphens(-) and back slashs(\)');
return false;
}
}
回答by Barney
Simply add them to the character group. Of course, because both -and /are special characters in this context (/ends a RegExp, -expresses a range), you'll need to escape them with a preceding \:
只需将它们添加到字符组即可。当然，因为在此上下文中-和/都是特殊字符（/结束正则表达式，-表示范围），您需要使用前面的 将它们转义\：
function validateAddress(){
var TCode = document.getElementById('address').value;
if( /[^a-zA-Z0-9\-\/]/.test( TCode ) ) {
alert('Input is not alphanumeric');
return false;
}
return true;
}
回答by ani
function isValidCharacter(txtTitle) {
var title = document.getElementById(txtTitle);
var regExp = /^[a-zA-Z]*$/
if (!regExp.test(title.value)) {
title.value = '';
return false;
}
else {
return true;
}
}
function Validation(){
var txtTitles = document.getElementById('txtTitle');
if (isValidCharacter(txtTitles.id) == false) {
alert("Please enter valid title. No special character allowed.");
return false;
}
}
$("#Btn").unbind("click").click(function () {
if (Validation() == false) {
}
else {
//success
}
}
回答by Ann
function namefun(c)
{
var spch=/[A-z\s]/ig;
var dig=/[0-9]/g;
var ln=c.length;
var j=1;
for(var i=0;i<ln;i++)
{
var k=c.slice(i,j);
if((spch.test(c)==false)||(dig.test(c)==true))
{
alert("Invalid name");
document.getElementById('tname').value="";
ln=0;
setTimeout(function(){tname.focus();}, 1);
//return false;
}
j++;
}
}
