[web2py] adding onFocus event to a field of an sql form

[pbt]

In models


db.define_table('list',
                Field('name', 'string'),
                Field('location', 'string'))


In controller

def list():
    form = SQLFORM.factory(
                           Field('name',label='Name',requires=IS_NOT_EMPTY()),
                           
Field('location',label='Location',requires=IS_NOT_EMPTY()))


          In default/list.html


{{=form}}



I want to execute an event onFocus="myFunction()" for field 'location' present 
in table 'list'.How to do it? Somebody help me.

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