function validateMovieRating()
{
    if(!radio_active(document.frmMovieRating.rating)) 
	{
		alert('Please enter a rating.')					
        return false
	}
     document.frmMovieRating.submit()

}

function radio_active(radio_group)
{
// Run through the group
	for (counter = 0; counter < radio_group.length; counter++) 
	{
	// When we find the activated button, return the index
	if (radio_group[counter].checked) 
	{
       return true
	}
    }
    // If no button is activated, return -1
    return false
}