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How to avoid double clicking of apex:commandButton?

Below sample code helps to avoid double clicking of apex:commandButton. Sample Code: <apex:pageBlockButtons location="bottom"> <apex:actionStatus id="saveStatus"> <apex:facet name="stop"> <apex:commandButton value="Next Step" action="{!newCase}" status="saveStatus" reRender="thefrm"/> </apex:facet> <apex:facet name="start"> <apex:commandButton value="Saving" disabled="true"/> </apex:facet> ....