var d=new Date();
time=d.getHours();
switch (time)
{
case 1:
  document.write('<div id="bat4"></div>');
break;
case 2:
  document.write('<div id="bat4"></div>');
break;
case 3:
  document.write('<div id="bat4"></div>');
break;
case 4:
  document.write('<div id="bat4"></div>');
break;
case 5:
  document.write('<div id="bat4"></div>');
break;
case 6:
  document.write('<div id="bat4"></div>');
break;
case 7:
  document.write('<div id="bat4"></div>');
break;
case 8:
  document.write('<div id="bat1"></div>');
break;
case 9:
  document.write('<div id="bat1"></div>');
break;
case 10:
  document.write('<div id="bat1"></div>');
break;
case 11:
  document.write('<div id="bat1"></div>');
break;
case 12:
  document.write('<div id="bat2"></div>');
break;
case 13:
  document.write('<div id="bat2"></div>');
break;
case 14:
  document.write('<div id="bat2"></div>');
break;
case 15:
  document.write('<div id="bat2"></div>');
break;
case 16:
  document.write('<div id="bat3"></div>');
break;
case 17:
  document.write('<div id="bat3"></div>');
break;
case 18:
  document.write('<div id="bat3"></div>');
break;
case 19:
  document.write('<div id="bat3"></div>');
break;
case 20:
  document.write('<div id="bat4"></div>');
break;
case 21:
  document.write('<div id="bat4"></div>');
break;
case 22:
  document.write('<div id="bat4"></div>');
break;
case 23:
  document.write('<div id="bat4"></div>');
break;
case 24:
  document.write('<div id="bat4"></div>');
break;
case 0:
  document.write('<div id="bat4"></div>');
break;
default:
  document.write('<div id="bat"></div>');
}