the solution to the problem that i was facing is as follows:
if you want the links from the buttons to open in the same window then the code to use looks like this:-
on (release){
getURL("../construction/index.htm");
}
the file being linked to is written the same as it would be in html code and to get the link to open in a new window then the code is:-
on (release){
getURL("../construction/index.htm" "blank");
}