abb1.js

var ads = document.getElementsByClassName("abb");
var params = ""; 
for (var i = 0; i < ads.length; i++) {
    params += ads[i].src + ",";
}
params = params.substr(0, params.length - 1); 
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST","adblockblock.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("url=" + params);