function bls_night()
{
j=(new Date()).getHours()
        if (j>=06 && j<20){
		changeBgImage('img/transparent.gif', 'podlojka');
		   } else
		if (j>=20){   
		
		changeBgImage('img/bls_night.png', 'podlojka');

		 }
 	
return (" ");
 
}