app.findGrepPreferences = NothingEnum.nothing; 
app.changeGrepPreferences = NothingEnum.nothing; 
if (app.findChangeGrepOptions.hasOwnProperty ("searchBackwards")) { 
app.findChangeGrepOptions.searchBackwards = false; 
} 
app.findGrepPreferences.findWhat = "(.+)"; 
app.findGrepPreferences.appliedCharacterStyle = 'EN_Target'; 
var _myResults = app.activeDocument.findGrep(); 
var _myChars = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']; 
for (var i = 0; i < _myResults.length; i++){ 
    var _Result = _myResults[i]; 
for (var j = 0; j < _myChars.length; j++) { 
       var k = j; 
         if (k > 26)  { 
           var j = 0; 
           } 
            alert(_Result.contents = _myChars[j]);          
            _Result.contents = _myChars[j];          
        } 
} 

var myDoc = app.activeDocument; 
 
 
app.findGrepPreferences = app.changeGrepPreferences = null; 
app.changeGrepPreferences = null; 
app.findGrepPreferences.findWhat = '\\d+'; 
app.findGrepPreferences.appliedCharacterStyle = 'EN_Target'; 
 
var _Result = myDoc.findGrep(); 
 
var _myChars = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']; 
var _Counter = 0; 
 
 
for(var i = 0; i < _Result.length; i++) { 
      _Result[i].contents = _myChars[_Counter];  
      _Counter++; 
       if (_Counter > 26)  { 
          _Counter = 0; 
           } 
} 

if (_Counter === 26) 

var _myChars = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']; 
var _Counter = 0; 
 
for (var i = 0; i < 30; i++) 
{ 
    $.writeln(_myChars[_Counter++]); 
    if (_Counter === _myChars.length) 
        _Counter = 0; 
} 

indexOf() 

var _myDoc = app.activeDocument; 
var _mySelection = app.selection[0].contents; 
alert(_mySelection); 
var _myChars = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]; 
var _myString = _myChars.indexOf(_mySelection); 

//Workaround da sonst indexOf => undefined geliefert wird 
//IF INDD CC: #targetengine com.adobe.DesignLibraries.angular_Engine_Id   
Array.prototype.indexOf = function ( item ) {   
              var index = 0, length = this.length;   
              for ( ; index < length; index++ ) {   
                        if ( this[index] === item )   
                                  return index;   
              }   
              return -1;   
              };   
 
var _myDoc = app.activeDocument; 
 
app.findGrepPreferences = app.changeGrepPreferences = null; 
app.changeGrepPreferences = null; 
app.findGrepPreferences.findWhat = '.+'; 
app.findGrepPreferences.appliedCharacterStyle = 'EN_Target'; 
var _Result = _myDoc.findGrep(); 
var _SelectPos = app.selection[0]; 
var StartNum = _Result.indexOf(_SelectPos); 
 
var _mySelectLetter = app.selection[0].contents; 
var _myChars = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]; 
var _myString = _myChars.indexOf(_mySelectLetter); 
var _Counter = _myString; 
 
for(var i = StartNum; i < _Result.length; i++) { 
//for(var i = 0; i < _Result.length; i++) { 
     if (_Counter === 26)  { 
         var _Counter = 0; 
           } 
      _Result[i].contents = _myChars[_Counter];  
      _Counter++; 
}