Validate Form to prevent gmail, yahoo and hotmail addresses

Hi, would like to have a form like this one where a user cannot enter gmail, yahoo or hotmail addresses in the email filed.

[url]http://pages.emptoris.com/GatedForm.htm[/url] … 20_2009_Q2

Have managed to make it work using this code:

<script type=”text/javascript”>
$(document).ready(function() {

$(‘#btn-submit’).click(function() {

$(“.error”).remove();
var hasError = false;
var emailReg = /^([w-.]+@([w-]+.)+[w-]{2,4})?$/;
var emailblockReg =
/^([w-.]+@(?!gmail.com)(?!yahoo.com)(?!hotmail.com)([w-]+.)+[w-]{2,4})?$/;

var emailaddressVal = $(“#UserEmail”).val();
if(emailaddressVal == ”) {
$(“#UserEmail”).after(‘<span class=”error”>Please enter your email address.</span>’);
hasError = true;
}

else if(!emailReg.test(emailaddressVal)) {
$(“#UserEmail”).after(‘<span class=”error”>Enter a valid email address.</span>’);
hasError = true;
}

else if(!emailblockReg.test(emailaddressVal)) {
$(“#UserEmail”).after(‘<span class=”error”>No yahoo, gmail or hotmail emails.</span>’);
hasError = true
}

if(hasError == true) { return false; }

});

});
</script>

My main problem is that i need to integrate it with this other validator but I dont know how, so that it works with the form i have already.

if ($id==3) return “var RegExp=/^{^((([a-z]|[0-9]|!|#|$|%|&|’|*|+|–|/|=|?|^|_|`|{|||}|~)+(.([a-z]|[0-9]|!|#|$|%|&|’|*|+|-|/|=|?|^|_|`|{|||}|~)+)*)@((((([a-z]|[0-9])([a-z]|[0-9]|–){0,61}([a-z]|[0-9]).))*([a-z]|[0-9])([a-z]|[0-9]|–){0,61}([a-z]|[0-9]).)[w]{2,4}|(((([0-9]){1,3}.){3}([0-9]){1,3}))|([((([0-9]){1,3}.){3}([0-9]){1,3})])))$/;} if (this.value!=” && !RegExp.test(this.value.toLowerCase())) show_message$uid(this,’$msg’,alert_mode);”; //e-mail

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