Special character validation

Question

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 acceptab

Answer 1

Input:

<input type="text" name="textname" id="tname"  onblur="namefun(this.value)">

Javascript

function namefun(c) {
  var spch = /[A-z\s]/gi;
  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++;
  }
}

Answer 2

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     
        }
   }

Answer 3

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 \:

function validateAddress(){
    var TCode = document.getElementById('address').value;

    if( /[^a-zA-Z0-9\-\/]/.test( TCode ) ) {
        alert('Input is not alphanumeric');
        return false;
    }

    return true;     
}