function setCompanionAd (new_rns) {
	var idc = document.getElementById("videoCompanionPosition");
	if (new_rns == undefined) {
		if (idc.nodeName.toLowerCase() != "iframe") {
			var ad_iframe = document.createElement('iframe');
			ad_iframe.id = "videoCompanionPosition";
			ad_iframe.scrolling = "no";
			ad_iframe.frameBorder = "0";
			ad_iframe.width = "300";
			ad_iframe.height = "250";
			ad_iframe.style.margin = "0px";
			ad_iframe.style.padding = "0px";
			idc.parentNode.replaceChild(ad_iframe, idc);
			idc = ad_iframe;
		}
		idc.src = "http://media.mgnetwork.com/mgvideocenter/iframe.html?sitepage=" + sitepage + "&poslist=" + oasPosList + "&flash_request=1";
	} else {
		var ad_pos = document.createElement('div');
		ad_pos.id = "videoCompanionPosition";
		ad_pos.innerHTML = new_rns;
		idc.parentNode.replaceChild(ad_pos, idc);
	}
}