Data Check Name:
Disable Page Save for 'Read Only' Group

Code:
/* ************************    
    Created by: JC    
    Date: 2013-03-29
    Purpose: To demonstrate how to    
        conditionally allow page saving based    
        on the associated user group.    
* ************************/   
DataCheck.ExecuteSQL( "IsMember", function( callback ) {
    var isMember = callback[0]["Enabled"] != 0;
    // If the user is a member of the group, then
    // FAIL.    
    if ( isMember ) {
        fail();     
        DataCheck.Alert("Attention", "You are not authorized to make changes to this screen.");
    } else {     
        pass();
    }
});

SQL Name:
IsMember

SQL Code:
SELECT COUNT(*) AS Enabled   FROM SecurityGroupMembers   WHERE    nUserUID = strUserUID   AND lActive <> 0   AND lDeleted = 0   AND nSecurityGroupUID = (    SELECT nSecurityGroupUID FROM SecurityGroups    WHERE cGroupName = 'Read Only'   )