dont forget to replace url :)

fb_detect_app.js

    var IS_ADMIN = '';
	document.base_url = 'http://bloodbook.digiatlb.com/';
	document.site_url = 'http://bloodbook.digiatlb.com/';
	document.scripts_url = 'http://bloodbook.digiatlb.com/scripts/';
	document.styles_url = 'http://bloodbook.digiatlb.com/styles/';
	document.uploads_url = 'http://bloodbook.digiatlb.com/uploads/';
	document.FB_APP_ID = '185057928349987';
    document.FB_PAGE_NAME = 'palangmerah';
    document.FB_PAGE_ID = '214889140098';
    
			document.IS_MOBILE = '';
	
    //--------------------------------------- REDIRECT to FB PAGE
    
    //console.log(IS_ADMIN);
    function NotInFacebookFrame() {
            return top === self;
          }

    function ReferrerIsFacebookApp() {
        if(document.referrer) {
          return document.referrer.indexOf("apps.facebook.com") != -1;
        }
        return false;
    }

    
    if ((NotInFacebookFrame() || ReferrerIsFacebookApp()) && IS_ADMIN !='bloodbook-admin/') { 
        top.location.replace("https://www.facebook.com/"+document.FB_PAGE_NAME+"/app_"+document.FB_APP_ID);        
    }