var city = document.getElementById('city');
    city.onclick = function() {
        var xml = getXML();
        var text = document.getElementById('text').value;
        xml.open('GET', 'http://api.asilu.com/weather/?callback=getName&city='+city.value'');
        xml.setRequestHeader('Content-Type', 'application/x-javascript;charset=UTF-8');
        xml.send();
        xml.onreadystatechange = function() {
            if (xml.readyState == 4 && xml.status == 200) {
                var data = xml.responseText;
                console.log(data);
            }
        }
    }
    function getXML() {
        var xml = null;
        if (window.XMLHttpRequest) {
            xml = new XMLHttpRequest();
        } else {
            xml = new ActiveXObject("Microsoft.XMLHTTP");
        }
        return xml;
    }
    
    
    //更改之后的
    
    
    city.onclick = function() {
    var xml = getXML();
    var text = document.getElementById('text').value;
    var sc=document.createElement('script');
    sc.src='http://api.asilu.com/weather';
    var b=document.getElementsByTagName('body')[0];
    b.appendChild(sc);
    
    xml.open('GET', sc,true);
    xml.send('callback=getName&city='+text'');
    xml.onreadystatechange = function() {
        if (xml.readyState == 4 && xml.status == 200) {
            var data = xml.responseText;
            console.log(data);
        }
    }
}