need help modifying a javascript auto-complete script
<p>I am trying to get a JavaScript auto complete script to show all of the possible options if you don't input anything in the field itself.</p>

<p>For example, it will list all the possibilities (every member from the input array) and if you start typing it narrows it down (what its already doing)</p>

<p>This is the script I am trying to modify: </p>

<pre><code>function AutoSuggest(elem, suggestions)
{
//The 'me' variable allow you to access the AutoSuggest object
//from the elem's event handlers defined below.
var me = this;
//A reference to the element we're binding the list to.
this.elem = elem;
this.suggestions = suggestions;
//Arrow to store a subset of eligible suggestions that match the user's input
this.eligible = new Array();
//The text input by the user.
this.inputText = null;
//A pointer to the index of the highlighted eligible item. -1 means nothing highlighted.
this.highlighted = -1;
//A div to use to create the dropdown.
this.div = document.getElementById("autosuggest");
//Do you want to remember what keycode means what? Me neither.
var TAB = 9;
var ESC = 27;
var KEYUP = 38;
var KEYDN = 40;
//The browsers' own autocomplete feature can be problematic, since it will
//be making suggestions from the users' past input.
//Setting this attribute should turn it off.
elem.setAttribute("autocomplete","off");
//We need to be able to reference the elem by id. If it doesn't have an id, set one.
if(!elem.id)
{
var id = "autosuggest" + idCounter;
idCounter++;
elem.id = id;
}
/********************************************************
onkeydown event handler for the input elem.
Tab key = use the highlighted suggestion, if there is one.
Esc key = get rid of the autosuggest dropdown
Up/down arrows = Move the highlight up and down in the suggestions.
********************************************************/
elem.onkeydown = function(ev)
{
var key = me.getKeyCode(ev);
switch(key)
{
case TAB:
me.useSuggestion();
break;
case ESC:
me.hideDiv();
break;
case KEYUP:
if (me.highlighted &gt; 0)
{
me.highlighted--;
}
me.changeHighlight(key);
break;
case KEYDN:
if (me.highlighted &lt; (me.eligible.length - 1))
{
me.highlighted++;
}
me.changeHighlight(key);
break;
}
};
/********************************************************
onkeyup handler for the elem
If the text is of sufficient length, and has been changed,
then display a list of eligible suggestions.
********************************************************/
elem.onkeyup = function(ev)
{
var key = me.getKeyCode(ev);
switch(key)
{
//The control keys were already handled by onkeydown, so do nothing.
case TAB:
case ESC:
case KEYUP:
case KEYDN:
return;
default:
if (this.value != me.inputText &amp;&amp; this.value.length &gt; 0)
{
me.inputText = this.value;
me.getEligible();
me.createDiv();
me.positionDiv();
me.showDiv();
}
else
{
me.hideDiv();
}
}
};
/********************************************************
Insert the highlighted suggestion into the input box, and
remove the suggestion dropdown.
********************************************************/
this.useSuggestion = function()
{
if (this.highlighted &gt; -1)
{
this.elem.value = this.eligible[this.highlighted];
this.hideDiv();
//It's impossible to cancel the Tab key's default behavior.
//So this undoes it by moving the focus back to our field right after
//the event completes.
setTimeout("document.getElementById('" + this.elem.id + "').focus()",0);
}
};
/********************************************************
Display the dropdown. Pretty straightforward.
********************************************************/
this.showDiv = function()
{
this.div.style.display = 'block';
};
/********************************************************
Hide the dropdown and clear any highlight.
********************************************************/
this.hideDiv = function()
{
this.div.style.display = 'none';
this.highlighted = -1;
};
/********************************************************
Modify the HTML in the dropdown to move the highlight.
********************************************************/
this.changeHighlight = function()
{
var lis = this.div.getElementsByTagName('LI');
for (i in lis)
{
var li = lis[i];
if (this.highlighted == i)
{
li.className = "selected";
}
else
{
li.className = "";
}
}
};
/********************************************************
Position the dropdown div below the input text field.
********************************************************/
this.positionDiv = function()
{
var el = this.elem;
var x = 0;
var y = el.offsetHeight;
//Walk up the DOM and add up all of the offset positions.
while (el.offsetParent &amp;&amp; el.tagName.toUpperCase() != 'BODY')
{
x += el.offsetLeft;
y += el.offsetTop;
el = el.offsetParent;
}
x += el.offsetLeft;
y += el.offsetTop;
this.div.style.left = x + 'px';
this.div.style.top = y + 'px';
};
/********************************************************
Build the HTML for the dropdown div
********************************************************/
this.createDiv = function()
{
var ul = document.createElement('ul');
//Create an array of LI's for the words.
for (i in this.eligible)
{
var word = this.eligible[i];
var li = document.createElement('li');
var a = document.createElement('a');
a.href="javascript:false";
a.innerHTML = word;
li.appendChild(a);
if (me.highlighted == i)
{
li.className = "selected";
}
ul.appendChild(li);
}
this.div.replaceChild(ul,this.div.childNodes[0]);
/********************************************************
mouseover handler for the dropdown ul
move the highlighted suggestion with the mouse
********************************************************/
ul.onmouseover = function(ev)
{
//Walk up from target until you find the LI.
var target = me.getEventSource(ev);
while (target.parentNode &amp;&amp; target.tagName.toUpperCase() != 'LI')
{
target = target.parentNode;
}
var lis = me.div.getElementsByTagName('LI');
for (i in lis)
{
var li = lis[i];
if(li == target)
{
me.highlighted = i;
break;
}
}
me.changeHighlight();
};
/********************************************************
click handler for the dropdown ul
insert the clicked suggestion into the input
********************************************************/
ul.onclick = function(ev)
{

me.useSuggestion();
me.hideDiv();
me.cancelEvent(ev);
return false;
};
this.div.className="suggestion_list";
this.div.style.position = 'absolute';
};
/********************************************************
determine which of the suggestions matches the input
********************************************************/
this.getEligible = function()
{
this.eligible = new Array();
for (i in this.suggestions)
{
var suggestion = this.suggestions[i];
if(suggestion.toLowerCase().indexOf(this.inputText.toLowerCase()) == "0")
{
this.eligible[this.eligible.length]=suggestion;
}
}
};
/********************************************************
Helper function to determine the keycode pressed in a
browser-independent manner.
********************************************************/
this.getKeyCode = function(ev)
{
if(ev) //Moz
{
return ev.keyCode;
}
if(window.event) //IE
{
return window.event.keyCode;
}
};
/********************************************************
Helper function to determine the event source element in a
browser-independent manner.
********************************************************/
this.getEventSource = function(ev)
{
if(ev) //Moz
{
return ev.target;
}
if(window.event) //IE
{
return window.event.srcElement;
}
};
/********************************************************
Helper function to cancel an event in a
browser-independent manner.
(Returning false helps too).
********************************************************/
this.cancelEvent = function(ev)
{
if(ev) //Moz
{
ev.preventDefault();
ev.stopPropagation();
}
if(window.event) //IE
{
window.event.returnValue = false;
}
}
}
//counter to help create unique ID's
var idCounter = 0;
</code></pre>

<p>I have been messing around with it for a while now, but I just cant get it to work. </p>
