Looping array by indexing some number

array_john_subci.js

var ar = ["5", "3", "jhj", "opp", "tyt", "hkl", "aji", "6", "3", "kak", "lop", "gyt", "uyt", "ert", "wqa", "2", "3", "hhh", "bbb", "2", "5", "jonru", "bando"];
var i = 0;
var x = 0;
var reschild = [];
var resparent = [];
var m = 0;
while (i < ar.length) {
    count_row = parseInt(ar[i]);
    length_text = parseInt(ar[i+1]);
    if(count_row > 0){
        first_x = i + 2;
        reschild = [];
        n = 0;
        for (x = first_x; x < count_row + i + 2; x++) {
            reschild[n] = ar[x];
            n++;
            document.getElementById('jajaltxt').value = document.getElementById('jajaltxt').value + ar[x] + ",";
        }
        i = x;
        resparent[m] = reschild;
        document.getElementById('jajaltxt').value = document.getElementById('jajaltxt').value + ";";
    } else {
        alert("invalid array");
        break;
    }
    m++;
    alert(i);
}
alert(JSON.stringify(resparent));