Apex Page Block

Apex Page Block

<apex:page controller="" showHeader="true">
    <script type="text/javascript">
    </script>
    <style type="text/css">
    </style>
    <apex:sectionHeader title="" subTitle="Receive Purchase Requests" />
    <apex:pageMessages />
    <apex:form >
        <apex:pageBlock title="">
            <apex:pageBlockButtons >
                <apex:commandBUtton action="{!cancel}" value="Cancel" />
            </apex:pageBlockButtons>
            
        </apex:pageBlock>
    </apex:form>
</apex:page>