Keyboard-friendly passwords

/*
 * pwd - Generate keyboard-friendly passwords
 * base: base chars
 * chars: basechars with anexing keys
 * special: special chars
 * gen: (function) generates password with arguments: 
 *    len: length of password
 *    spec: number of special characters
 *    retruns: string of length len
 *
 * r: (function) returns a random number with arguments:
 *    max: max number
 *    min: min number
 */
 
var pwd = {
  base : "1234567890qwertyuiopasdfghjklzxcvbnm", 
  chars : {
  c1 : ["2","q"], c2 : ["1","q","w","3"], c3 : ["2","w","e","4"],	
  c4 : ["3","e","r","5"],  c5 : ["4","r","t","6"], c6 : ["5","t","y","7"],	
  c7 : ["6","y","u","8"],  c8 : ["7","u","i","9"], c9 : ["8","i","o","0"],	
  c0 : ["9","o","p"], cq : ["1","2","w","s","a"],	
  cw : ["2","3","e","s","a","q"], ce : ["3","4","r","d","s","w"],	
  cr : ["4","5","t","f","d","e"], ct : ["5","6","y","g","f","r"],	
  cy : ["6","7","u","h","g","t"], cu : ["7","8","i","j","h","y"],
  ci : ["8","9","o","k","j","u"], co : ["9","0","p","l","k","i"],	
  cp : ["0","l","o"], ca : ["q","w","s","z"], cs : ["w","e","d","x","z","a"],	
  cd : ["e","r","f","c","x","s"], cf : ["r","t","g","v","c","d"],	
  cg : ["t","y","h","b","v","f"], ch : ["y","u","j","n","b","g"],
  cj : ["u","i","k","m","n","h"], ck : ["i","o","l","m","j"],	
  cl : ["o","p","k"], cz : ["a","s","x"], cx : ["s","d","c","z"],	
  cc : ["d","f","v","x"], cv : ["f","g","b","c"], cb : ["g","h","n","v"],	
  cn : ["h","j","m","b"], cm : ["j","k","n"]
  },
  special : ["!","@","#","$","%","&","/","(",
  ")","=","?","+",".",",",":",";","_","-"," "],
  gen : function(len,spec){
    var xs=[]; var xi,xr;
    for(xi=0; xi<(len-spec); xi++) {
      if(xs.length<1) { xs[xs.length] = pwd.base.substr(pwd.r(pwd.base.length),1); 
        continue; }
      xr = pwd.r(pwd.chars["c"+xs[xi-1]].length);
      xs[xs.length] = pwd.chars["c"+xs[xi-1]][xr];
    }
    for(xi=0; xi<spec; xi++){ xr = pwd.r(xs.length); 
    xs[xr] = xs[xr].toUpperCase(); 
    xs.splice(xr,0,pwd.special[pwd.r(pwd.special.length)]); }
    return xs.join("");
  },
  r : function(max,min) {
    min = min || 0;
    return min + Math.floor(Math.random()*((max-min)));
  }
}