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				@@ -77,7 +77,7 @@ window.backPage = function () { 
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				   if (pages.length > 1) { 
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				     navToPage({ delta: 1 }, 'navigateBack') 
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				   } else { 
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				-    if (window.location.indexOf('/packageHome/pages/codeActivity/activityExplain') > -1) { 
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				+    if (window.location.href.indexOf('/packageHome/pages/codeActivity/activityExplain') > -1) { 
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				       window.history.back() 
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				     } else { 
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				       var searchParams = window.location.search 
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