Collapse PageBlockSection

Collapse PageBlockSection by default on page load:

    <apex:page>  <apex:pageBlock id="block1">      <apex:pageBlockSection id="section1" columns="2" collapsible="true" title="Title">          Example Area      </apex:pageBlockSection>      <script>          twistSection(document.getElementById('{!$Component.block1.section1}').getElementsByTagName('img')[0])      </script>    </apex:pageBlock>  </apex:page>  

Disable collapse ability:

    <apex:page>  <apex:pageBlock id="block1">      <apex:pageBlockSection id="section1" columns="2" collapsible="false" title="Title">          Example Area      </apex:pageBlockSection>  </apex:pageBlock>  </apex:page>