Listboxes don't behave as standard Windows ComboBoxes

  
//End JS Functions  
var typeAheadInfo = {last:0,  
currentString:"",  
delay:1000,  
timeout:null,  
reset:function() {this.last=0; this.currentString=""}  
};  
  
function typeAhead() {  
if (window.event && !window.event.ctrlKey) {  
var now = new Date();  
  
if (typeAheadInfo.currentString == "" || now - typeAheadInfo.last <   
typeAheadInfo.delay) {  
  
var myEvent = window.event;  
var selectElement = myEvent.srcElement;  
var keyCode = myEvent.keyCode;  
  
// The NumPad returns slightly differant keyCodes then the numbers on the   
type of the keyboard.  
// If we subtract 48 it will return the correct keyCode.  
if (keyCode >= 96 && keyCode <=105) {  
keyCode = keyCode - 48;  
}  
  
var newChar = String.fromCharCode(keyCode).toUpperCase();  
typeAheadInfo.currentString += newChar;  
  
var selectOptions = selectElement.options;  
var txt, nearest;  
for (var i = 0; i < selectOptions.length; i++) {  
// change this from .text to .value to use the value of the item instead of   
the visual text if desired  
txt = selectOptions.text.toUpperCase();  
nearest = (typeAheadInfo.currentString >  
txt.substr(0, typeAheadInfo.currentString.length)) ? i : nearest;  
  
if (txt.indexOf(typeAheadInfo.currentString) == 0) {  
clearTimeout(typeAheadInfo.timeout);  
typeAheadInfo.last = now;  
typeAheadInfo.timeout = setTimeout("typeAheadInfo.reset()",   
typeAheadInfo.delay);  
selectElement.selectedIndex = i;  
  
myEvent.cancelBubble = true;  
myEvent.returnValue = false;  
  
return false;  
}  
}  
if (nearest != null) {  
selectElement.selectedIndex = nearest;  
}  
} else {  
clearTimeout(typeAheadInfo.timeout);  
}  
typeAheadInfo.reset();  
}  
return true;  
}