Html Conversion square brackets

I trying to send varible name that is followed by square brackets out of flash such as product[]
i need to have the square brackets in order for html to read the variable.

this is my code

on (release) {
// Initialize form variables:
formData = new LoadVars();
formData.userid = “B1”;
formData.product= “hat” ;
formData.price = “125.00”;
formData.qty = “”;
formData.product[] = “”;
formData.color = “”;
// Get combo box selections:
formData.qty = quantity_cb.getValue();
formData.product[]= size_cb.getValue();
formData.color = color_cb.getValue();
formData.send(“http://www.thesite.com/cf/add.cfm”, “_self”, “POST”);
}
any ideas