JS - Error Handling - Try throw catch finally

<script type="text/javascript">

var numerator = Number(prompt("enter numerator"));
 var denominator = Number(prompt("enter denominator")); 



 try { 
if( denominator == 0){ 
throw{
error: "divided by 0",
message: " customize error msg "
}
}
else {
document.write("REsult is "+ (numerator/denominator));
}

 }
 catch (e){
console.log(e) // [Object object]
console.log(e.error, e.message)  // custome Error Message 
 }
 finally
{
// if there is exception or not finally block will execute
console.log("finally block");
}


</script>