Change the url of buttons

1

Hi i got template from one of my friend i cant change url of these buttons can any one help me .fla file is located here and script used on buttons is
on (rollOver)
{
if (_root.link != num)
{
gotoAndPlay(“s1”);
}
}
on (rollOut, releaseOutside)
{
if (_root.link != num)
{
gotoAndPlay(“s2”);
}
}
on (release)
{
if (_root.link != num)
{
_parent[“item” + _root.link].gotoAndPlay(“s2”);
_root.link = num;
num != 1;
}
}