eiru_payslip_generator/view/payslip_generator.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
	<data>
        <record id="view_eiru_payslip_generator" model="ir.ui.view">
            <field name="name">view.eiru.payslip.generator</field>
            <field name="model">hr.payslip.run</field>
            <field name="inherit_id" ref="hr_payroll.hr_payslip_run_form"/>
            <field name="arch" type="xml">
				<xpath expr="//header" position="replace">
					<header>
						<div class="eiru-payslip-generator" attrs="{'invisible': [('state','!=','draft')]}"></div>
				  		<field name="state" widget="statusbar"/>
			  		</header>
				</xpath>
				<field name="credit_note" position="replace"></field>
            </field>
        </record>
	</data>
</openerp>