It depends on which version of Actionscript your file is using.
For an AS2 file you use getURL() to link to a web page. You could use the setTimeout() function to delay triggering the getURL() call.
For AS3 you use navigateToURL() to link to a web page. You could use the setTimeout() function or the Timer class to delay triggering the navigateToURL() call.
In both cases you could place the call to the linking function inside another function that you call either using the delayed calls of the functions mentioned, or using a button to call the function for the skip intro.