| re: Preventing Simultaneous Functions
kid wrote:[color=blue]
> I need help with a page i'm coding which has several functions to
> dynamically change the display. Everything works fine but the problem
> is that I need to have the final function wait for all others to
> finish before it resets certain onscreen buttons and then returns.I'm
> having trouble implementing this efficiently and would greatly
> appreciate any help/comments.[/color]
Yeah... what Thomas said... except, here is a basic outline of something
you might want to try... untested, but it should help out. If you show
more, we can help more.
First of all, I am assuming you must be using something like setTimeout
on all of your functions to execute. This assumption is based off the
fact that Javascript executes serially in all browsers I know about.
This means that you should know when a script is done, unless you are
setting events (via setTimeout or setInterval).
Ok, making that assumption, think about this:
/////////////////////////////////////////////////////////////////
var func1_done = false;
var func2_done = false;
var func3_done = false;
function func1() {
//... code
func1_done = true;
}
function func2() {
//... do someting
func2_done = true;
}
function func3() {
//... do something
func3_done = true;
}
function checkForDone() {
if( func1_done && func2_done && func3_done )
{
// Do what you need to do... all three are done
}
else
setTimeout("checkForDone()", 500); // check again in 1/2 sec
}
/////////////////////////////////////////////////////////////////
Then, you can run checkForDone, when you want to execute your code. It
will only execute if 1, 2 and 3 are done. If not, it will try again in
half of a second (change this to whatever you think is necessary)
Also, for good programming practices, use an array for the funcN_done
flags, if you have more than three functions to worry about.
Brian
| 
