function ds1()


{

  window.open("http://perso.wanadoo.es/sl918120738/fondo-escritorio-piramides-egipto.zip","","")
}



function av(u, an, al)
{

 var w=screen.width; 
 var h=screen.height; 
 var xx = an;
 var yy = al;
 var x = (w/2) - (xx/2); 
 var y = (h/2) - (yy/2);
	v = window.open(u,'ventana','resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,width='+xx+',height='+yy+',screenX='+x+',screenY='+y+',left='+x+',top='+y+'');		
	v.focus ();
}	



function av800x600()

{
  
  y =window.open("../publ/publicidad.html","",     "toolbar=no,directories=no,menubar=no,resizable=yes,location=no,status=no,scrollbars=yes,width=800,height=600,left=0,top=0,titlebar=no"); 
}




   function en(msg,i)

  {
    window.status=msg;
    
    document.getElementById('li'+i).style.display='list-item';

   return true;
     
  }


   function sa(i)

  {

    window.status='';
    document.getElementById('li'+i).style.display='inline';

     return true;
  }


























































imagen1=new Image();
imagen1.src="btn1.gif"
imagen2=new Image();
imagen2.src="btn2.gif"

function cambiar() {                       
   
      document.images['publi'].src=imagen2.src
   
     
    //  document.images['publi'].src=imagen1.src;
    
     setTimeout("document.images['publi'].src=imagen1.src; ds1();",500);

 
 
   }