JS Experiment Sort By Length SRC (Unfinised!!)

<script>
var fin="";
var amm=prompt("Enter #");
for(var ii=0;ii<amm;ii++){
var out=prompt("");
var split=(out.length/2);
var R=split;
for(var i=0;i<out.length;i++){
fin+=Math.floor(Math.random()*R)+"\n";
}
var arr=fin;
}
alert(arr);
</script>