JS Base 64 Split Rot13 Concat Base 64 Encoding Algorithm SRC

<script>
function spaceOutStr(Stringy){
var p="Stringy"
for(var i=0;i<p.length/2;i++){
var out=p.substring(i,p.length/2);
if(i%2){
//document.write(out+'even<br>');
}else{
//document.write(out+'odd<br>');
  var out1=out/2

}
}
 var one=(p.substring(i,p.length-p.length))
  var two=(p.substring(i,p.length))
  var base=atob(one)
  var rot=rot13(two)
  var t=atob(rot)
alert(base+t)

  function rot13(string) {
var result = '';
var str = string;
function strg(out){
    var result1 = [];
    return result1 = out.split('');
  }
  var alphArr =strg('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
  var inverseArr =strg('nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKL');
 for ( var i = 0; i < str.length; i++ ) {
     if (alphArr.indexOf( str[i] ) !== -1)
 {
        result += inverseArr[ alphArr.indexOf(str[i]) ];
    } else result += str[i];
  }
 return result;
}
}
</script>
<body onload="spaceOutStr('123456789');">