Javascript for me too :-) <script type="text/javascript"> var wort = "93752xxx746..."; var erg = 0; var tmpwort=""; for(i=0;i<wort.length;i++){ if(wort.charAt(i)=='x'){ tmpwort = wort.slice(0,i); tmpwort = tmpwort + wort.slice(i+1); wort = tmpwort; i = i -3; } else { er...