Validate email field input

[gaidem]

I have a client script which will ensure input into an email field contains a valid email address:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
   //If the page isn't loading
   if (!isLoading) {
      //If the new value isn't blank
      if(newValue != '') {
         //Type appropriate comment here, and begin script below
         var oldV = oldValue;
  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
  strEmail = g_form.getValue(email);

   // search email text for regular exp matches
    if (strEmail.search(validRegExp) == -1)
   {
      alert('A valid e-mail address is required.');
      g_form.setValue('email',oldV);
    }
   

      }
   }
}

[CapaJC]

I've gotta take some sort of class on regular expressions some day. This is cool.

Out of box, if a field has an internal_type of "email" (like the Email field on the sys_user form), the following Validation Script (found in System Definition) runs on form submit:

function validate(value) {
   if (value == null || value == "")
      return true;
   if (isEmailValid(value))
      return true;
   else
      return "Invalid email address";
}

The functions behind that are:

function isEmailValid(value){
var problemMsg = isEmailValidWithReason(value);
if (problemMsg != "") {
jslog("isEmailValid: " + problemMsg);
return false;
}
return true;
}

// validate email address and return a reason why it is not valid
function isEmailValidWithReason(value) {
var localPartChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!#$%*/?|^{}`~&'+-=_.";
var domainChars =    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";

// break into local part and domain
if (value.indexOf("@") == -1)
return "missing @ sign";
var s = value.split("@");
if (s.length != 2)
return "too many at signs";

// check the local part of the address
if (!containsOnlyChars(localPartChars, s[0]))
return "invalid character before the at sign";
if (s[0].length < 1)
return "at least one character must be before the at sign";
if (s[0].substr(0,1) == ".")
return "period cannot be the first character";
if (s[0].substr(s[0].length-1,1) == ".")
return "period cannot be the last character before the at sign";

// check the domain part of the address
if (!containsOnlyChars(domainChars, s[1]))
return "invalid character after the at sign";
var periodIndex = s[1].indexOf(".");
if (periodIndex == -1)
return "missing period after the at sign";
if (periodIndex == 0)
 return "period cannot be the first character after the at sign";
var periods = s[1].split(".");
var lastPeriod = periods[periods.length-1];
if (lastPeriod.length < 2)
return "must be at least 2 characters after the last period";
if (!isAlphaNum(s[1].substr(0,1)))
return "the first character after the at sign must be alphanumeric";
if (!isAlphaNum(s[1].substr(s[1].length-1,1)))
return "the last character must be alphanumeric";
return ""; // address is OK
}

[ideamax]

I am not able to find this function isEmailValid(). can you please point me where this function is defined?

Thanks.

[davidself3]

So that script is ServiceNows OOB validation for emails?

How are you able to get to that script to know what it is?

[GoBucks]

Where is the function isEmailValid() defined?   Where is the script that contains the definition for the isEmailValid() function that you have provided?

Thanks in advance.