Just started using jQuery and found people using two different styles of syntax. can anyone shed some light on the correct way?

Option 1

2.     <script src="jquery-1.4.4.js" type="text/javascript"></script>
3.     <script type="text/javascript">
4.         $(document).ready(function () {
5.             $(myID).hide();
6.         });
7.     
8.     </script>

Option 2 

2.     <script src="jquery-1.4.4.js" type="text/javascript"></script>
3.     <script type="text/javascript">
4.         $(document).ready(function () {
5.             $('#myID').hide();
6.         });
7.     
8.     </script>

Thanks.