1- To avoid having an empty drop down box appear when I return an empty set of matches, I return the word ‘hide’ and then I test for this word in the script. On line 481 in version 1.2, you can add an extra line that tests to see if the word ‘hide’ has been returned as the matching text. If it has, the function returns right away instead of displaying the drop down. You should be able to replicate this with returning xml or json instead of text, and you should be able to use any other word aside from hide.
…
/**
* Parses the TEXT result, adds options
* @param {String} text The text response to parse
*/
_parseText: function(text)
{
//custom changes to script
// don’t display an empty dropdown; just return if the word ‘hide’ is returned by the ajax request
if(text===’hide’){return;}
//end changes
var suggestions = (text||”").split(/\n/);
for(i = 0; i < suggestions.length; i++)
this._addOption(suggestions[i]);
},
…

2 – Wanting the behavior where pressing the backspace or delete keys don't cause the drop down list of suggestions to disappear, I commented that in lines 331 to line 335, in the _suggest function.
It looks like this now:
…
switch(key)
{
case Event.KEY_LEFT:
case Event.KEY_RIGHT:
return false;
break;
case Event.KEY_TAB:
//case Event.KEY_BACKSPACE:
//case 46: //Delete
// this.cancel();
// return false;
// break;
case Event.KEY_RETURN:
if(this.visible)
…

I hope this is helpful to someone.
Thanks for the script!

code :


<?php
$code = <<<CODE

CODE;
?>

result :<? echo Array ["title"];

any want help me please ?

code :

<?php
$code = <<<CODE

var hb3 = new HelpBalloon({
title:”,
content: ‘ ‘
+ ‘Le:’
});

CODE;
?>

result :<? echo Array ["title"];

any want help me please ?

verry Thanks to all