Need advice on actionscript to post form variables

[BWWebDesigns]

Need advice on the following

I have a flash button that takes dynamic input and then posts the variables to a page using a form post method within the flash such as below

on (release) {
// Create the LoadVars that will hold our paypal information
var paypal = new LoadVars();
paypal.cmd = "_xclick";
paypal.item_name = Item_name;
paypal.amount = input_txt.vr_amount;
paypal.business = Paypal_email_address;
paypal.currency_code = Paypal_currency_code;
paypal.lc = Paypal_country;
paypal.notify_url = Paypal_notify_url;
paypal.return = Paypal_return_url;
paypal.cancel_return = Paypal_cancel_return_url;
paypal.tax = Paypal_tax;
paypal.pal = Paypal_affiliate_code;
paypal.mbr = Paypal_affiliate_code;
paypal.bn = Paypal_button_type;
paypal.on0 = Paypal_option_name_one;
paypal.os0 = Paypal_option_selection_one;


//This is where we send our information to PayPal.
paypal.send("https://www.paypal.com/cgi-bin/webscr","_blank","POST");
}

What i need to know is, as you can see the code above needs to submit a form field with a variable name of return as in paypal.return, so paypal can take the info in this field and know the return url after payment

My problem is i noticed that the word return is some kind of special function within flash so when typing paypal.return it makes the word blue and im guessing will not process the action script correctly because of this

Now to my question, do i simply wrap single quotes or something round the word like so paypal.'return' = etc etc

Or what?

Thanks in advance

[BWWebDesigns]

just to clarify this is the compile error message i get when trying either of the above

Expected a field name after '.' operator.

Source line
paypal.return = Paypal_return_url;

I have tried it like that and with quites round the word return but neither work