var now = new Date();
var interstitialLaunch1 = new Date(2003,11,8,0,1,00); 
var interstitialKill1   = new Date(2003,11,9,23,59,00);
interstitial.setCondition( '((now > interstitialLaunch1) && (now < interstitialKill1))' );
interstitial.setProperty ( new WpniAdProperty ("cookieName","tech_int") );
interstitial.setProperty ( new WpniAdProperty ("cookieExpires",24 * 60 * 60 * 1000) ); // 1 day
interstitial.setProperty( new WpniAdProperty("delayTime", 7 * 1000) ); // 7 seconds