xmlhttprequest phonegap无法使用url工作

Question

function showUser(str) {
    if (str == "") {
        document.getElementById("txtHint").innerHTML = "";
        return;
    }
    if (window.XMLHttpRequest) {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp = new XMLHttpRequest();
    } else { // code for IE6, IE5
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
        }
    }
    xmlhttp.open("GET", "http://moonrays00.comli.com/getuser.php?q=" + str, true);
    xmlhttp.send();
}

我无法让这个工作我计划让这个项目适用于Android

该项目基于

http://www.w3schools.com/php/php_ajax_database.asp