function nwindow(mypage,myname,w,h,scroll,pos)
	{
	  if (pos=="random")
	  {
		LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;
		TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
	  }
	  else if (pos=="center")
	  {
		LeftPosition=(screen.width)?(screen.width-w)/2:100;
		TopPosition=(screen.height)?(screen.height-h)/2:100;
	  }
	  else
	  {
		LeftPosition=0;
		TopPosition=20;
	  }
	
	  settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
	  win=window.open(mypage,myname,settings);
	
	  if(win.focus)
	  {
		win.focus();
	  }
	}

	function redimensionar (ancho, alto)
	{
	  LeftPosition=(screen.width)?(screen.width-ancho)/2:100;
	  TopPosition=(screen.height)?(screen.height-alto)/2:100;
	
	  window.moveTo(LeftPosition,TopPosition);
	  window.resizeTo(ancho,alto);
	  window.focus();
	}