JS Get Ammount Of Numbers/Chars in Str SRC

<script>
function spaceOutStr(Stringy){
var p=Stringy
for(var i=0;i<p.length;i++){
var out=p.substring(i,i+1);
if(i%2){
document.write(out+'even<br>');
}else{
document.write(out+'odd<br>');
}
}
}
</script>
<body onload="spaceOutStr('123456789');">