function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}


function RenderAd(){
	if(readCookie("slidercookie")) {
		return null
	}
	else {
		document.cookie = 'slidercookie=yes';
		ShowAd('sliding_ad');
	}
}

function HideAd(element){
	new Effect.BlindUp(element,{duration:1});
}

function ShowAd(element){
	new Effect.BlindDown(element,{duration:1});
	var t=setTimeout("HideAd('sliding_ad')",15000)
}