Enabling and disabling a PageBlockSection in Salesforce
Sample code: Visualforce page: <apex:page controller="Sample" ><apex:form ><apex:pageblock id="pg" > <apex:pageblockSection columns="1" title="PBS1" rendered="{!pbs1}" > <apex:pageblocksectionItem > <apex:inputCheckbox value="{!pbs1cb1}"> <apex:actionSupport event="onchange" action="{!check}" reRender="pg"/> </apex:inputCheckbox> </apex:pageblocksectionItem> <apex:pageblocksectionItem > <apex:inputCheckbox value="{!pbs1cb2}"> <apex:actionSupport ....