Ajax call inside each loop

I found many posts with this topic. But the solutions I found is not much unsuitable for me. Some experts advised to change code structure, but I am not sure how can I do that.

What I want:
1) Get a list of movie from SQL database
2) Fetch information from a website for each movie

Problem I face: PHP MAX_TIMEOUT occurs.

Solution I thought: call async req for each movie, separately

Bottleneck: Too many async requests

Can you please advice how to implement that (if possible only JS, not jquery please)?

Some solutions from web:

1) Use ASYNC = FALSE.... I don't want to use SYNC req, pointless of using Ajax then
2) Collect all data, then make Ajax call once ... well, I did that first .. but it is a long script (fetching movie info from web), so ultimately causing PHP MAX_TIMEOUT
3) increase PHP MAX_TIMEOUT ... not feasible, I don't know how much to increase.

JS

function loadData(mArray){
    mArray = [{"movieid":"1","title":"10 Things I Hate About You"},{"movieid":"2","title":"100 Girls"}]; // TO SIMLYFY, I PUT THIS CODE HERE .. NORMALLY I GET THIS ARRAY USING ANOTHER AJAX CALL
    for (var i = 0; i < mArray.length; i++) { 
        var obj = mArray[i];
        webAjaxcall(obj["mid"],obj["title"]);  // DEFINITELY NOT A GOOD IDEA
    }
    return true;
}

function webAjaxcall(mid,title){
    var xmlhttp=new XMLHttpRequest();
    xmlhttp.onreadystatechange=function(){
        if (xmlhttp.readyState==4 && xmlhttp.status==200){
            //DO SOMETHING
        }
    }
    xmlhttp.open("POST","file2.php",true);
    xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
    params = "title="+title+"&mid="+mid;
    xmlhttp.send(params);
}

Just in case anybody wants to know how I populate the JS array:

FILE 1

$sql = "SELECT `movieid`,`title` FROM movielist";
    $result = mysql_query($sql) or die(mysql_error());
    while($row=mysql_fetch_assoc($result)){
    $output[] = $row;
    }
    exit(json_encode($output));

FILE 2

$json=file_get_contents("http://www.website.com/?t=".rawurlencode($moviename));
$info=json_decode($json);
DO SOMETHING

AJAX TO GET MOVIELIST

var xmlhttp=new XMLHttpRequest();
var myarr;
xmlhttp.onreadystatechange=function(){
    if (xmlhttp.readyState==4 && xmlhttp.status==200){
        myarr = xmlhttp.responseText;
        loadData(JSON.parse(myarr));
    }
}
xmlhttp.open("POST","file1.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
params = "fname=<?php echo $ses_id;?>";
xmlhttp.send(params);