function load() {
    $.post("engine/loadC.php", {fileName : "key.txt"}, function(data) {        
            key = JSON.parse(data);
            aftercode();
    });
}
function process() {
    load(); 
   
}

function aftercode() {
    alert(window.key);
    /* последующий код */
}

var products = [
    {"id": "1", "name": "Имя1"},
    {"id": "2", "name": "Имя2"},
    {"id": "3", "name": "Имя3"}
];
     
var html = '<table>';
var cnt  = 0;     
for(var i in products) {
    if(cnt == 0) {
        html += '<tr>';
    }
    html += '<td>'+products[i]['id']+'</td>' + '<td>'+products[i]['name']+'</td>';
    cnt++;
    if(cnt == 2) {
        cnt = 0;
        html += '</tr>';
    }
} 
if(cnt != 0) {
    html += '<td></td><td></td></tr>';
}
html +='</table>';

$val = array_map(function($a){ return "{".$a."}"; }, array_values($arr));