javascript - referring script stuck in a loop -


what trying redirect user based on referring url promo page. in script below if comes referring url “mydomainsite.com” sent “mydomainsite.com/promo.html” when have script below in page “mydomainsite.com/promo.html” , comes refer of “mydomainsite.com” seems loop or continue load page , never loads page “mydomainsite.com/promo.html” script has in “mydomainsite.com/promo.html,” page being promo page , can’t have access page. assume due indexof , checks “mydomainsite.com” executes. there away fix this? 

<script language="javascript"> if (document.referrer.indexof('mydomainsite.com') > -1) location.href='http://mydomainsite.com/promo.html'; else location.href='http://notfrommydomainsite.com'; </script>

as has been mentioned in comments referrer data not reliable, if want pursue this...

the mqost cause of issue have when arriving @ redirected promo.html finds referrer mydomainsite.com goes creating infinite loop.

you need test , avoid loop checking location.pathname not promo.html :

if (document.referrer.indexof ('mydomainsite.com') > -1 &&          location.pathname !== 'promo.html')     location.href = 'http://mydomainsite.com/promo.html';

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