The easiest way is probably to add the class to all the elements you need to bind and use it:
$(".event-user").click(function() { })
If this is not an option, you can use id for your form and request all its children:
$("#my-form input[type=text]").click(function() { })
And if none of them is possible, you can always use a list of selectors separated by commas:
$("#siteAddress, #phoneNumber, #reg-email, #reg-login") .click(function() { })
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