Using objGlobal to pass optional parameters

Extending the idea in the previous section slightly, you can introduce the concept of optional parameters being passed into scripts. In a script that needs to pass some optional parameters into another script you might find code like this:

     objGlobal.OptParms = new Object();  
     objGlobal.OptParms.CustNumber = "12345";
     objGlobal.OptParms.CustName   = "ACME ENGINEERING";      
     NAVIGATE_TO_DESTINATION("uShowCustomer");

and the script that receives the optional parameters you would find code possibly structured something like this:

     var CustNumber = "some default value";
     var CustName   = "some default value";
 
     if (objGlobal.OptParms != null)
     {
        CustNumber         = objGlobal.OptParms.CustNumber; 
      CustName           = objGlobal.OptParms.CustName;   
      objGlobal.OptParms = null;
     } 
 
     /* Now we proceed to use the values in CustNumber and CustName */

The line objGlobal.OptParms = null; line is very important to this style of processing because it destroys the temporary OptParms object.