Client script on record Project task

Hello,

Some function on my script don't work only on this record project task.

i have some errors when i do for example ==>

var employee = record.load({

type : record.Type.EMPLOYEE,

id : 6

});

TypeError record.load is not a function.

or EMPLOYEE is undefined.

Same error when i use :

var savedSearchId = 'customsearch_price_r_gen';

var mySearch = search.load(savedSearchId);

TypeError search.load is not a function

is it not possible to use those function on this project task record ?

i try to use it on some function like page_init, validate_field or field_changed.

Best Regards.

Mathieu.