User Profile Autofill

I was able to add readonly atributes through form_api, then I will create link "Update link" after school number using theme template. The last step is to AJAXify this form, with content from existing nodes (schools).

I have simple question here:
How can add PHP if statement (form id = user_register) for my function:

...
function glue_init() {
	drupal_add_css(drupal_get_path('module', 'glue') .'/glue.css');
	drupal_add_js(drupal_get_path('module', 'glue') .'/glue.js');
}

Solution.
Create new module, with js file:
1. Add update link
2. Create URL variable (quite easy when automatic title generation is enabled using id as a token)
3. Request data from URL (page content)
4. Pass your data to your fields.

PS> I don't know how to add js only for registration form in my module.

$(document).ready(function() {
$('<a href="#" class="glue">Update Details</a>').appendTo('#edit-profile-id-wrapper');
$('a.glue').click(function() {
	var profile_id = $('[name=profile_id]').val();
	var alias = '/id/';
	var url = alias + profile_id;
	$.ajax({
		url: url,
		success: function(data) {
	    var $idName = $('.field-field-id-name .field-item', data);
		var sn = $idName.text();	
	    var $address1 = $('.field-field-id-address1 .field-item', data);
		var a1 = $address1.text();
	    var $address2 = $('.field-field-id-address2 .field-item', data);
		var a2 = $address2.text();
	    var $address3 = $('.field-field-id-address3 .field-item', data);
		var a3 = $address3.text();
		var $address4 = $('.field-field-id-address4 .field-item', data);
		var a4 = $address4.text();
	    $('#edit-profile-idname').val(sn);
		$('#edit-profile-bill1').val(a1);
		$('#edit-profile-bill2').val(a2);
		$('#edit-profile-bill3').val(a3);
		$('#edit-profile-bill4').val(a4);
		}
	});
	return false;
});
});