[HOW TO create "BANNER" IN ireport jasper?]

I want to add Banner in my group header and print  whenever the group changes. How to I create a banner? I am using iReport 3.7.0 version.

Please also note that the report is generated in txt format from jrxml

Code used:

<textField isBlankWhenNull="true">

<reportElement style="banner" mode="Opaque" x="2" y="4" width="801" height="27" isRemoveLineWhenBlank="true" printWhenGroupChanges="institution_group"/>

<textElement textAlignment="Center"/>

<textFieldExpression class="java.lang.String"><![CDATA[$F{INSTITUTION_CODE}]]></textFieldExpression>

</textField>

 

But this sets a formatted style not a banner!

 

Thank you in advance. Anyone? Any help will be appreciated.