javascript - Concatenation function name in js -


Is there a way to include the JS function name? Now I have this: 

  switch (play id) {case "11": play 11 (); break; Case "22": Play 22 (); break; Case "33": play33 (); break; Case "44": Play 44 (); break; Default: Break; }   
 And I want to do something like this:  
  var function = "play" + playId + "()";   
 And call it .. What is the best way if possible?  
 
  Solution:   
 What did I do with the help of  thefourtheye  and  xdazz  :  
  var playFunction = window ["play" + playId]; PlayFunction ();    
 
 
 If these functions are defined in global scope, you can obtain them globally Object can:  
  var foo = window ["play" + taskId];   
 Otherwise you can put them together in one object as if another answer has been suggested.

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