WebIf: insert a function call after poll. This can be used by template builders without touching oscam.js. If exist in page template, the function afterpoll(){} will executed after each poll. 
	
	

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@9607 4b0bc96b-bc66-0410-9d44-ebda105a78c1