function show(){
    document.getElementById('topOpacity').style.display = "block";
    document.getElementById('topAlert').style.display = "block";

	var scnWid,scnHei;
	if (self.innerHeight) // all except Explorer
	{
		scnWid = self.innerWidth;
		scnHei = self.innerHeight;
	}
	else if (document.documentElement && document.documentElement.clientHeight)
		// Explorer 6 Strict Mode
	{
		scnWid = document.documentElement.clientWidth;
		scnHei = document.documentElement.clientHeight;
	}
	else if (document.body) // other Explorers
	{
		scnWid = document.body.clientWidth;
		scnHei = document.body.clientHeight;
	}

    document.getElementById('topOpacity').style.height = scnWid+"px";

    document.getElementById('topAlert').innerHTML ='<h2>Oferta jest nieaktualna</h2>';


    return false;
}