AJAX and PHP

AJAX Suggest and Autocomplete
}
if(response.childNodes.length)
{
/* we retrieve the new functions' names from the document element as
an array */
nameArray= xmlToArray(response.getElementsByTagName("name"));
}
// check to see if other keywords are already being searched for
if(httpRequestKeyword == userKeyword)
{
// display the results array
displayResults(httpRequestKeyword, nameArray);
}
else
{
// add the results to the cache
// we don't need to display the results since they are no longer useful
addToCache(httpRequestKeyword, nameArray);
}
/* populates the list with the current suggestions */
function displayResults(keyword, results_array)
{
// start building the HTML table containing the results
var div = "";
// if the searched for keyword is not in the cache then add it to the cache
if(!oCache[keyword] && keyword)
addToCache(keyword, results_array);
// if the array of results is empty display a message
if(results_array.length == 0)
{
div += "No results found for " + keyword +
"";
// set the flag indicating that no results have been found
// and reset the counter for results
hasResults = false;
suggestions = 0;
}
// display the results
else
{
// resets the index of the currently selected suggestion
position = -1;
// resets the flag indicating whether the up or down key has been pressed
isKeyUpDownPressed = false;
/* sets the flag indicating that there are results for the searched
for keyword */
hasResults = true;
// get the number of results from the cache
suggestions = oCache[keyword].length;
// loop through all the results and generate the HTML list of results
for (var i=0; i