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A: Yes, you can do it a couple of ways. If you don't want to do it with JavaScript, you can still do it with ColdFusion. The script below provides a sample submission form as well as the validation code.
<cfset valid = "true">
<cfif isDefined("formSubmit")>
<cfloop from="1" to="11" index="count">
<cfif (count is "4") or (count is "7")>
<cfif Mid(SSN,count,1) neq "-">
<cfset valid="false">
</cfif>
<cfelse>
<cfif REFind("[^0-9]",Mid(SSN,count,1),1) gt "0">
<cfset valid="false">
</cfif>
</cfif>
</cfloop>
<cfif valid is "false">
A valid social security number was not submitted!
<cfelse>
A valid social security number was submitted!
</cfif>
<cfelse>
<form action="test2.cfm" method="post">
SSN (xxx-xx-xxxx):<br>
<input name="SSN" type="Text" size="20" maxlength="11">
<input type="Submit" name="formSubmit" value="Submit">
</form>
</cfif>The following was submitted by HERMIER Christophe
This question have already been answered but the answer was far too complicated !!! You can do it all with just one regular expression no need to loop !!
<CFIF ReFind ( SSN, "^[0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9][0-9][0-9]" ) is 0 > <CFOUTPUT> "#SSN#" is not a valid SSN ! </CFOUTPUT> <CFELSE> OK : valid SSN number </CFIF>