function processImages() {
    alert(dropped_file.files.length);
    for (var x = 0; x < dropped_file.files.length; x++) {
        var xmlhttp = new XMLHttpRequest();
        xmlhttp.onreadystatechange = function() {
            if (this.readyState == 4 && this.status == 200) {
                alert("success");
            }
        };
        xmlhttp.open("POST", "uploadToMercer.cfm", true);
        xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        xmlhttp.send(dropped_file.files[x]);
    }
}