document.writeln('
');
function rand ()
{
return ( Math.floor ( Math.random ( ) * 4 + 1 ) );
}
var rand_nm = rand ();
switch(rand_nm) {
case 1:
document.writeln('
');
break;
case 2:
document.writeln('
');
break;
case 3:
document.writeln('
');
break;
case 4:
document.writeln('
');
break;
default :
document.writeln('
');
break;
}