Salesforce Visualforce Page

Salesforce

How to switch from one tab to another using button in Visualforce page?

Sample Code:Visualforce page: <apex:page controller="Sample"> <apex:form >     <apex:tabPanel id="theTabPanel" value="{!tabOpt}">         <apex:tab label="One" name="One" id="One"><apex:commandButton value="Go to Two" action="{!switch}"/></apex:tab>         <apex:tab label="Two" name="Two" id="Two">content for tab two</apex:tab>     </apex:tabPanel> ....