php - Can't Save MySQL Query

I'm having an issue with my MySQL query/php, I try to update a row in my database that will work usually, but when the string has a ' in it, for example

I don't like green eggs and ham.

The ' in it will cancel the whole response out and not update the row, so if I put something like this without the ' for example:

I dont like green eggs and ham.

The string will save to the row. Below is the MySQL query used and where I get the string from.

$NewMessage = $_POST['message123'];

mysql_query("UPDATE Account SET `function` = 'Message', `note` = '$NewMessage' WHERE `id` = '$ID' AND `Online` = '1'"); 

If you need anymore source or anything, please let me know, let me know what you think, thanks!