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Email Address Validation

Posted on 2011-10-26
Medium Priority
Last Modified: 2012-05-12
I need to amend a function that will prevent users from entering an @gmail or @msn or @yahoo email address to a web based CRM application

The code attached works fine and warns if the format of the address is not correct.

However, based on this script, could someone help with changes required to prevent the above from happening.

Many thanks
function emailvalidation(x,y) 
if (x.length>0) 
if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2) 
Valid = false; 
ErrorStr = CRM.GetTrans("colnames",y)+ " ["+x+"] "+ CRM.GetTrans("GenCaptions","BadMailAddress"); 

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Question by:MimUK
  • 2
  • 2
LVL 25

Accepted Solution

Lee Savidge earned 1000 total points
ID: 37031397
In principle quite simple but when you get into it, quite difficult. Id do this...


if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2)


if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2 || x.replace("@gmail.", "").length < x.length || x.replace("@yahoo.", "").length < x.length || x.replace("@msn.", "").length < x.length || x.replace("@googlemail.", "").length < x.length)

I added googlemail.com as it is synonymous with gmail.com.

LVL 25

Expert Comment

by:Lee Savidge
ID: 37031403
You could if you wanted to get clever with it, add all these restricted domains as translations in CRM and that way you could rewrite the function so that the function loops around checking whatever the end customer has added to translations so the list could be modified without altering the script.

Depends how clever you wanted to be with it.


Author Closing Comment

ID: 37031433
Great Thanks.
Works a Treat

Author Comment

ID: 37781227
Having deployed the script...

We have found that if the user enters @MSN or @Gmail the validation doesn't work as the expression is case sensitive.

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