function cache_pub (pub_interstitiel){
	var affichePub = document.getElementById(pub_interstitiel); 
	affichePub.style.visibility = "hidden";
	var affichePubOverlay = document.getElementById(pub_interstitiel+'_overlay'); 
	affichePubOverlay.style.visibility = "hidden";
}

function interstitiel (pub_interstitiel){
var temps_milli_secondes = 5000;

var screen_height = $(document).height();

var div_overlay = pub_interstitiel + '_overlay';
var affichePubOverlay = document.getElementById(div_overlay);
affichePubOverlay.style.visibility = "visible";
affichePubOverlay.style.height = screen_height+"px";

var div = pub_interstitiel;
var affichePub = document.getElementById(div);
affichePub.style.visibility = "visible";

setTimeout ("cache_pub ('pub_filiere')", temps_milli_secondes); 
}