Show/hide A Radio Button

I have a form I've created that pulls a list of options out of an access db. It then generates a table with a radiobutton and the course details. I use this code to throw up the radiobutton and when the user chooses an option, the id for that course is submitted. The code also takes -1 away from the value of a field linked to that record called "currentcount" (tracking the number of students that can register in that class)

Now I want to show the radio button if the currentcount field is >0 and hide if it's 0 or less. I also need the text 'session full' to appear if the currentcount is 0. My code for the radiobutton is Code:

<input name="session1" type="radio" value="<%= (traininglist.Fields.Item("sessionid").Value) %>">

So how do I show/hide this?