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Registration form validation script gives an error in Chrome. See attachment for the error.

Quote:jQuery.Deferred exception: $(...).validate is not a function TypeError: $(...).validate is not a function

    at HTMLDocument.<anonymous>

Template "Member_register" Code:
<script type="text/javascript">
$(document).ready(function() {
		rules: {
			username: {
				required: true,
				minlength: {$mybb->settings['minnamelength']},
				maxlength: {$mybb->settings['maxnamelength']},
				remote: {
					url: "xmlhttp.php?action=username_availability",
					type: "post",
					dataType: "json",
						my_post_key: my_post_key
			email: {
				required: true,
				email: true,
			email2: {
				required: true,
				email: true,
				equalTo: "#email"
		messages: {
			username: {
				minlength: "{$lang->js_validator_username_length}",
				maxlength: "{$lang->js_validator_username_length}",
			email: "{$lang->js_validator_invalid_email}",
			email2: "{$lang->js_validator_email_match}",
		errorPlacement: function(error, element) {
			if(':checkbox') ||':radio'))
				error.insertAfter($('input[name="' + element.attr('name') + '"]').last().next('span'));


I hope you can help me!
Solved it. And that is why you probably did not respond. It is a custom theme, Emerald that I customized.

What was wrong is that the script was not called in the template member_register.

<script type="text/javascript" src="{$mybb->asset_url}/jscripts/validate/jquery.validate.min.js?ver=1821"></script>

I placed this directly under the headerinclude and all was fine.
Like this.

<title>{$mybb->settings['bbname']} - {$lang->registration}</title>
<script type="text/javascript" src="{$mybb->asset_url}/jscripts/validate/jquery.validate.min.js?ver=1821"></script>