Global locator not working

Hi there i am making a website with about eight pages, all the buttons are on the main page, I have the pages tweening in, when the user clicks a button i would like these pages to tween back out then bring the new page in. I think you do this by using the global locator syntax. I have been using instances for my buttons, the following script is on frame 60

stop();
_global.locator;
contact_BT.onRelease = function() {
play();
_global.locator = “contact”;
};

Could anyone tell me this same script but so it can go on the button rather than instance names as it is not working at all. Cheers. Ed