script LANGUAGE="JavaScript"> function pop(vurl,vheight,vwidth,vleft,vtop) { cadena="win"; numero=Math.random()*1000; numero=parseInt(numero); ancho=vwidth; alto=vheight; vleft=(window.screen.width/2)-(ancho/2); vtop=(window.screen.availHeight/2)-(alto/2); //vleft = (screen.availWidth - vheight)/2; //vtop = (screen.availHeight - vwidth)/2; window.open(vurl,cadena+numero,"scrollbars=no,height="+vheight+",width="+vwidth+",left="+vleft+",top="+vtop); }