Filling Comma Separated Values into TextBox

Filling Comma Separated Values into TextBox

HTML

<input type="text" name="a">
<input type="text" name="b">
<input type="text" name="c">
<input type="text" name="d">

JavaScript

var val = [1,3,1,3,2,1,3,2,3,2,3,3];
//var val = val.split(',');

    var sum=0;

$.each(val, function (indexa,obj) {

    //var hi = this;

    //$("input").each(function (indexb) {
//alert(this);
        //if (indexa == indexb) {
sum +=obj;
            //$(this).val(hi);
        //}
    });

alert(sum);
alert(sum/val.length);
//});