gistfile1.txt

// If we query the nodes from the DOM first, we save CPU cycles.
var nodes = {};

nodes.row = document.getElementById("row");
nodes.results = document.getElementById("results");

function getStates(str) 
{
    if (str.length == 0) 
    {
        nodes.row.innerHTML = "";
        nodes.results.innerHTML = "";
    } 
    else 
    {
        var xhr = new XMLHttpRequest();
        
        // The load event will fire even if the request fails.
        xhr.addEventListener('load', function() 
        {
            // That way we can log the results to the console when it does fail.
            if (xhr.status !== 200) 
            {
                console.log(xhr.status, xhr.statusText, xhr.responseText);
                return;
            }
            
            nodes.results.innerHTML = xhr.responseText;
        }, false);
        
        xhr.open('GET', 'support/getStates.php?q=' + str, true);
        
        xhr.send();
    }
}