function readOnly(count){ }
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<apex:page > <apex:form > <apex:pageBlock id="PB1"> <apex:pageBlockSection > <apex:commandButton status="waitStatus" value="Load Image" reRender="PB1"/> </apex:pageBlockSection> </apex:pageBlock> <apex:actionStatus id="waitStatus" style="align:center;"> <apex:facet name="start"> <apex:image value="/img/loading.gif" title="Processing..."/> </apex:facet> <apex:facet name="stop"></apex:facet> </apex:actionStatus> </apex:form> </apex:page>
<apex:page > <apex:form > <apex:pageBlock id="PB1"> <apex:pageBlockSection > <apex:selectList value="{!abcFilter}" multiselect="false" size="1"> <apex:selectOption itemValue="A,B,C" itemLabel="All"/> <apex:selectOption itemValue="A" itemLabel="A"/> <apex:selectOption itemValue="B" itemLabel="B"/> <apex:selectOption itemValue="C" itemLabel="C"/> <apex:actionSupport event="onchange" status="waitStatus" reRender="PB1" /> </apex:selectList> </apex:pageBlockSection> </apex:pageBlock> <apex:actionStatus id="waitStatus" style="align:center;"> <apex:facet name="start"> <apex:image value="/img/loading.gif" title="Processing..."/> </apex:facet> <apex:facet name="stop"></apex:facet> </apex:actionStatus> </apex:form> </apex:page>
Please reffer below blog :-
http://amitsalesforce.blogspot.in/2015/02/progress-barloading-image-on_11.html
This will help you
Thanks,
Amit Chaudhary
Mark this as solution if this will help you