If my understanding is correct, the problem you are trying to solve is that there are various functions that need to be fired by window onload, but these are contained in various widgets and macros so you never know which ones and how many will need to be fired?
The way I would approach it is something like this:-
I would have a page variable "str_onload_functions" to store a string. There would also be a function called fn_add_onload_function_name which would append function names, (as strings, probably seperated by commas) to str_onload_functions. each time you have a widget or macro that needs to add a new window.onload function fired, you would pass it the function name as a string. Then (hmm.. this is starting to sound overcomplicated at this point!) there would be a function somewhere omnipresent called fn_execute_onload_functions that would look at str_onload_functions and if it isn't empty, split the string into an array and loop through using exec() to fire each one. then you would just have one call to window.onload which fires fn_execute_onload_functions
This way you would only be storing a string in memory... or maybe you would just add the names directly to an array so you don't need to split it up later
Comment
If my understanding is correct, the problem you are trying to solve is that there are various functions that need to be fired by window onload, but these are contained in various widgets and macros so you never know which ones and how many will need to be fired?
The way I would approach it is something like this:-
I would have a page variable "str_onload_functions" to store a string. There would also be a function called fn_add_onload_function_name which would append function names, (as strings, probably seperated by commas) to str_onload_functions. each time you have a widget or macro that needs to add a new window.onload function fired, you would pass it the function name as a string. Then (hmm.. this is starting to sound overcomplicated at this point!) there would be a function somewhere omnipresent called fn_execute_onload_functions that would look at str_onload_functions and if it isn't empty, split the string into an array and loop through using exec() to fire each one. then you would just have one call to window.onload which fires fn_execute_onload_functions
This way you would only be storing a string in memory... or maybe you would just add the names directly to an array so you don't need to split it up later
my two pence worth :-)