function window4(url) {

	   window.open(url,'_blank','location=yes,scrollbars=yes,tolbar=yeso,width=640,height=480');
	  }

	 function window2(url)
	{
	  window.open(url,'_blank','location=no,scrollbars=no,tolbar=20,width=250,height=250');
	 }

	 function pop_up_window2(url) {

	    window.open(url,'_blank','location=no,scrollbars=yes,tolbar=no,width=600,height=500');
	}

	  function popupwindow3(url) {

	   window.open(url,'_blank','location=no,scrollbars=yes,tolbar=no,width=800,height=600');
	  }
	    function geturl (bvl){
	 self.location.href = document.bvl.navi.options[document.bvl.navi.options.selectedIndex].value;
	 return false;
	 }

	  function window3(url) {

	   window.open(url,'_blank','location=no,scrollbars=yes,tolbar=no,width=600,height=480');
	  }