Iris: Statt Zahlen Buchstaben Anzeigen

Kann mir Bitte jemand sagen wie ich bei diesem JavaScript statt der Zahlen im Matrixformat Buchstaben anzeigen lassen kann, denn ich schaffe es einfach nicht ?

Vielen Dank sagt ganz lieb Iris

<head>
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<body>
<script language="JavaScript">
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Cl=48;//Space's are included so real length is 48!
Cs=150;
Ts=13;
Tc='#008800';
Tc1='#00ff00';
MnS=20;
MxS=30;
I=Cs;
Sp=new Array();S=new Array();Y=new Array();
C=new Array();M=new Array();B=new Array();
RC=new Array();E=new Array();Tcc=new Array(1,0);
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document.write("<div style='position:relative'>");
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A[i].innerHTML=M[i]+' '+E[i]+' ';
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setTimeout('Cycle()',20)
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Cycle();
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