If email field is filled out, make sure it is validated

email-field-validation.js

jQuery(document).ready( function() {
	
	jQuery('.refer form').submit( function(){
	
		return validateForm(this);
		
	});
	
});
 
function validateForm(form){
 
	var v = jQuery(form).find('.validate');
	
	v.each( function(){
		if( jQuery(this).val() != '' && jQuery(this).hasClass('email') ){
				if( validateEmail(jQuery(this).val()) ){
						jQuery(this).removeClass('error');
				}else{
						jQuery(this).addClass('error');
				}
		}else{
			jQuery(this).removeClass('error');
		}
	});

	if( jQuery(form).find('.error').length > 0 ){
		return false;
	}else{
		return true;
	}	
}
function validateEmail(email) { 
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
}