check if function is defined

[junkjones]

Is there a way to check to see if a function is defined? Sort of like checking to see if a variable is defined?

Long story on why I need this, but let's just say that sometimes the function will be there, sometimes it won't.

(The call to the function is in a frame that refreshes all the time, and the function is in another frame that refreshes all the time - when the call to the function runs and tries to run the function while the frame is refreshing, the function is not there and gives an error). I really really really really hope there is a way to check if a function is defined or not!!!

Thanks!!!

 

[trollacious]

Have you tried:

if (functionname)
{
.....
}
else
{
.....
}

 

[junkjones]

Yes - if it exists, the true condition runs. However, if it does not exist, it just gives a javscript error.