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Recursive parental function callers

/ Published in: JavaScript
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This snippet allows to know the parent function caller name of any level from the calling function.

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Copy this code and paste it in your HTML 
  1. <SCRIPT LANGUAGE="javascript" TYPE="text/javascript">
  2. Function.prototype.myname = function() { return this.toString().substr( 0, this.toString().indexOf( "(" ) ).replace( "function ", "" ) ; }
  3. Function.prototype.callername = function( _level )
  4. {
  5.      // level 0 is this functon
  6.      _level = parseInt( _level, 10 );      if ( isNaN( _level ) || _level < 0 ) _level = 0 ;
  7.      var _eval_str = "arguments.callee" ;
  8.      for( var _l = 0 ; _l <= _level ; _l++ ) _eval_str += ".caller" ;
  9.  
  10.      _eval_str += ".myname();" ;
  11.      return eval( _eval_str ) ;
  12. }
  13.  
  14. function _child_caller()
  15. {
  16.     document.write( "This function is " + arguments.callee.callername(0) ) ;
  17.     document.write( "<br>" );
  18.     document.write( "Parent function is " + arguments.callee.callername(1) ) ;
  19.     document.write( "<br>" );
  20.     document.write( "Grand Parent function is " + arguments.callee.callername(2) ) ;
  21. }
  22.  
  23. function _parent_caller()
  24. {
  25.     _child_caller() ;
  26. }
  27.  
  28. function _grand_parent_caller()
  29. {
  30.     _parent_caller() ;
  31. }
  32.  
  33. _grand_parent_caller();
  34. </SCRIPT>

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