A component that displays the status of an AJAX update request. An AJAX request can either be in progress or complete.
Sample Code:
<apex:page >
<apex:form >
<apex:pageBlock id=”ab” >
<apex:pageBlockSection >
<apex:pageBlockSectionItem ><apex:commandButton value=”Status” status=”sts” reRender=”ab”/></apex:pageBlockSectionItem>
</apex:pageBlockSection>
<apex:actionStatus id=”sts” startText=”Loding…….”/>
</apex:pageBlock>
</apex:form>
</apex:page>
Output: