javascript - JS Codecademy exercise NS_ERROR_NOT_AVAILABLE: -

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i coding newbie. learning js on codecademy , keep getting error : ns_error_not_available. doing wrong in following code? 

prompt ("are ready play");  confirm ("i ready play!");  var age = prompt("what's age");  if("age" <= 12) {        console.log("play @ own risk");  } else {        console.log("play on!");  }

age variable, not string, there no need quotes:

prompt ("are ready play");  confirm ("i ready play!");  var age = prompt("what's age");  if(age <= 12) {        console.log("play @ own risk");  } else {        console.log("play on!");  }

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