After completion of current function run next

Hi All,

I am attempting to run a particular function upon the completion of the another function. If anyone has any ideas it would be greatly appreciated!!

This is what I attempted but I believe this only works for movieclips.

slide_left();
slide_left.complete = function() {
slide_down();
};

or

slide_left();
if(slide_left = complete) {
slide_down();
};

neither seems to work, but its probably because these are intended for movieclips

developmental