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Mamatha MasterMamatha Master 

Problem with visual force tab click the entire page is Postback

I have an Visual Force tab when I click the tab the entire page is Postedback instead I want  only the iframe to refresh

and also I need Ajax loading image when I click the tab and iframe is refreshing..

here is the code snipet which I used

<apex:page sidebar="true">
<apex:iframe src="https://MyCustomURL" scrolling="true"/>
</apex:page>