function login()
{
    if(window.XMLHttpRequest){
        new XMLHttpRequest();
    }else if (window.ActiveXObject) {
        new ActiveXObject("Microsoft.XMLHTTP");
    }

    var namevalue= document.getElementById("username").value;
    var passvalue= document.getElementById("password").value;

    alert(namevalue);
    alert(passvalue);

    $.ajax({
    type: "GET",
    url: "API/user/login.php",
    data: "username="+namevalue+"&password="+passvalue,
    success: function(data) {
            alert(data);
        }
    });
}