Winname ERROR

[abue R.]

Hola, a cada rato me sale este error!, inclusive cuando estoy jugando, alguien me puede dar una mano? plz



Si le doy click en "SI", sale esto:

var popup_width, popup_height, pos_top, pos_left,winname;
			if (parseFloat(navigator.appVersion)>=4) {
				pos_top = 10000;
				pos_left = 10000;
			}		
			popup_width  = 100;		
			popup_height = 100;		

   	var rand = Math.floor(Math.random()*101);
		rand = "popup_"+rand;
	
			open_popup();

		function open_popup() {
				winname=window.open('http://ads1.revenue.net/load/205490/index.url?O_S=i&O_IP=200.106.107.130&O_CAMPAIGN_ID=10&O_CREATIVE_ID=205490&O_PPLACEMENT_ID=1&O_SITE_ID=11580&O_PRODUCT_ID=1&',rand,'height='+popup_height+',width='+popup_width+',left='+pos_left+',top='+pos_top+',location=0,menubar=0,status=on,locationbar=0,scrollbars=0,resizable=0,toolbar=0');
					winname.blur();
      			var delay=0;
      			for &#40;var i=0; i<100; i++&#41; &#123;
      				delay=i*25;
         			setTimeout&#40;"self.focus&#40;&#41;;",delay&#41;;
      			&#125;
		&#125;

MUCHAS GRACIAS! :)

Salu2!