function sack(file) {
	this.xmlhttp = null;

	this.resetData = function() {
		this.method = "POST";
  		this.queryStringSeparator = "?";
		this.argumentSeparator = "&";
		this.URLString = "";
		this.encodeURIString = true;
  		this.execute = false;
  		this.element = null;
		this.elementObj = null;
		this.requestFile = file;
		this.vars = new Object();
		this.responseStatus = new Array(2);
  	};

	this.resetFunctions = function() {
  		this.onLoading = function() { };
  		this.onLoaded = function() { };
  		this.onInteractive = function() { };
  		this.onCompletion = function() { };
  		this.onError = function() { };
		this.onFail = function() { };
	};

	this.reset = function() {
		this.resetFunctions();
		this.resetData();
	};

	this.createAJAX = function() {
		try {
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e1) {
			try {
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e2) {
				this.xmlhttp = null;
			}
		}

		if (! this.xmlhttp) {
			if (typeof XMLHttpRequest != "undefined") {
				this.xmlhttp = new XMLHttpRequest();
			} else {
				this.failed = true;
			}
		}
	};

	this.setVar = function(name, value){
		this.vars[name] = Array(value, false);
	};

	this.encVar = function(name, value, returnvars) {
		if (true == returnvars) {
			return Array(encodeURIComponent(name), encodeURIComponent(value));
		} else {
			this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
		}
	}

	this.processURLString = function(string, encode) {
		encoded = encodeURIComponent(this.argumentSeparator);
		regexp = new RegExp(this.argumentSeparator + "|" + encoded);
		varArray = string.split(regexp);
		for (i = 0; i < varArray.length; i++){
			urlVars = varArray[i].split("=");
			if (true == encode){
				this.encVar(urlVars[0], urlVars[1]);
			} else {
				this.setVar(urlVars[0], urlVars[1]);
			}
		}
	}

	this.createURLString = function(urlstring) {
		if (this.encodeURIString && this.URLString.length) {
			this.processURLString(this.URLString, true);
		}

		if (urlstring) {
			if (this.URLString.length) {
				this.URLString += this.argumentSeparator + urlstring;
			} else {
				this.URLString = urlstring;
			}
		}

		// prevents caching of URLString
		this.setVar("rndval", new Date().getTime());

		urlstringtemp = new Array();
		for (key in this.vars) {
			if (false == this.vars[key][1] && true == this.encodeURIString) {
				encoded = this.encVar(key, this.vars[key][0], true);
				delete this.vars[key];
				this.vars[encoded[0]] = Array(encoded[1], true);
				key = encoded[0];
			}

			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
		}
		if (urlstring){
			this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
		} else {
			this.URLString += urlstringtemp.join(this.argumentSeparator);
		}
	}

	this.runResponse = function() {
		eval(this.response);
	}

	this.runAJAX = function(urlstring) {
		if (this.failed) {
			this.onFail();
		} else {
			this.createURLString(urlstring);
			if (this.element) {
				this.elementObj = document.getElementById(this.element);
			}
			if (this.xmlhttp) {
				var self = this;
				if (this.method == "GET") {
					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} else {
					this.xmlhttp.open(this.method, this.requestFile, true);
					try {
						this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
					} catch (e) { }
				}

				this.xmlhttp.onreadystatechange = function() {
					switch (self.xmlhttp.readyState) {
						case 1:
							self.onLoading();
							break;
						case 2:
							self.onLoaded();
							break;
						case 3:
							self.onInteractive();
							break;
						case 4:
							self.response = self.xmlhttp.responseText;
							self.responseXML = self.xmlhttp.responseXML;
							self.responseStatus[0] = self.xmlhttp.status;
							self.responseStatus[1] = self.xmlhttp.statusText;

							if (self.execute) {
								self.runResponse();
							}

							if (self.elementObj) {
								elemNodeName = self.elementObj.nodeName;
								elemNodeName.toLowerCase();
								if (elemNodeName == "input"
								|| elemNodeName == "select"
								|| elemNodeName == "option"
								|| elemNodeName == "textarea") {
									self.elementObj.value = self.response;
								} else {
									self.elementObj.innerHTML = self.response;
								}
							}
							if (self.responseStatus[0] == "200") {
								self.onCompletion();
							} else {
								self.onError();
							}

							self.URLString = "";
							break;
					}
				};

				this.xmlhttp.send(this.URLString);
			}
		}
	};

	this.reset();
	this.createAJAX();
}

  var ajaxBox_offsetX = 0;
  var ajaxBox_offsetY = 0;
  var ajax_list_externalFile = '/ajaxResults.php';  // Path to external file
  var minimumLettersBeforeLookup = 1;  // Number of letters entered before a lookup is performed.
  
  var ajax_list_objects = new Array();
  var ajax_list_cachedLists = new Array();
  var ajax_list_activeInput = false;
  var ajax_list_activeItem;
  var ajax_list_optionDivFirstItem = false;
  var ajax_list_currentLetters = new Array();
  var ajax_optionDiv = false;
  var ajax_optionDiv_iframe = false;

  var ajax_list_MSIE = false;
  if(navigator.userAgent.indexOf('MSIE')>=0 && navigator.userAgent.indexOf('Opera')<0)ajax_list_MSIE=true;
  
  var currentListIndex = 0;
  
  function ajax_getTopPos(inputObj)
  {
    
    var returnValue = inputObj.offsetTop;
    while((inputObj = inputObj.offsetParent) != null){
      returnValue += inputObj.offsetTop;
    }
    return returnValue;
  }
  function ajax_list_cancelEvent()
  {
    return false;
  }
  
  function ajax_getLeftPos(inputObj)
  {
    var returnValue = inputObj.offsetLeft;
    while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetLeft;
    
    return returnValue;
  }
  
  function ajax_option_setValue(e,inputObj)
  {
    if(!inputObj)inputObj=this;
    var tmpValue = inputObj.innerHTML;
    if(ajax_list_MSIE)tmpValue = inputObj.innerText;else tmpValue = inputObj.textContent;
    if(!tmpValue)tmpValue = inputObj.innerHTML;
    ajax_list_activeInput.value = tmpValue;
    if(document.getElementById(ajax_list_activeInput.name + '_hidden'))document.getElementById(ajax_list_activeInput.name + '_hidden').value = inputObj.id; 
    ajax_options_hide();
  }
  
  function ajax_options_hide()
  {
    if(ajax_optionDiv)ajax_optionDiv.style.display='none';  
    if(ajax_optionDiv_iframe)ajax_optionDiv_iframe.style.display='none';
  }

  function ajax_options_rollOverActiveItem(item,fromKeyBoard)
  {
    if(ajax_list_activeItem)ajax_list_activeItem.className='optionDiv';
    item.className='optionDivSelected';
    ajax_list_activeItem = item;
    
    if(fromKeyBoard){
      if(ajax_list_activeItem.offsetTop>ajax_optionDiv.offsetHeight){
        ajax_optionDiv.scrollTop = ajax_list_activeItem.offsetTop - ajax_optionDiv.offsetHeight + ajax_list_activeItem.offsetHeight + 2 ;
      }
      if(ajax_list_activeItem.offsetTop<ajax_optionDiv.scrollTop)
      {
        ajax_optionDiv.scrollTop = 0;  
      }
    }
  }
  
  function ajax_option_list_buildList(letters,paramToExternalFile)
  {
    
    ajax_optionDiv.innerHTML = '';
    ajax_list_activeItem = false;
    if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length<=1){
      ajax_options_hide();
      return;      
    }
    
    
    
    ajax_list_optionDivFirstItem = false;
    var optionsAdded = false;
    for(var no=0;no<ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length;no++){
      if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()][no].length==0)continue;
      optionsAdded = true;
      var div = document.createElement('DIV');
      var items = ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()][no].split(/###/gi);
      
      if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length==1 && ajax_list_activeInput.value == items[0]){
        ajax_options_hide();
        return;            
      }
      
      
      div.innerHTML = items[items.length-1];
      div.id = items[0];
      div.className='optionDiv';
      div.onmouseover = function(){ ajax_options_rollOverActiveItem(this,false) }
      div.onclick = ajax_option_setValue;
      if(!ajax_list_optionDivFirstItem)ajax_list_optionDivFirstItem = div;
      ajax_optionDiv.appendChild(div);
    }  
    if(optionsAdded){
      ajax_optionDiv.style.display='block';
      if(ajax_optionDiv_iframe)ajax_optionDiv_iframe.style.display='';
      ajax_options_rollOverActiveItem(ajax_list_optionDivFirstItem,true);
    }
          
  }
  
  function ajax_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile,whichIndex)
  {
    if(whichIndex!=currentListIndex)return;
    var letters = inputObj.value;
    var content = ajax_list_objects[ajaxIndex].response;
    var elements = content.split('|');
    ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()] = elements;
    ajax_option_list_buildList(letters,paramToExternalFile);
    
  }
  
  function ajax_option_resize(inputObj)
  {
    ajax_optionDiv.style.top = (ajax_getTopPos(inputObj) + inputObj.offsetHeight + ajaxBox_offsetY) + 'px';
    ajax_optionDiv.style.left = (ajax_getLeftPos(inputObj) + ajaxBox_offsetX) + 'px';
    if(ajax_optionDiv_iframe){
      ajax_optionDiv_iframe.style.left = ajax_optionDiv.style.left;
      ajax_optionDiv_iframe.style.top = ajax_optionDiv.style.top;      
    }    
    
  }
  
  function ajax_showOptions(inputObj,nCatID,nItemID,paramToExternalFile,e)
  {
    if(e.keyCode==13 || e.keyCode==9)return;
    if(ajax_list_currentLetters[inputObj.name]==inputObj.value)return;
    if(!ajax_list_cachedLists[paramToExternalFile])ajax_list_cachedLists[paramToExternalFile] = new Array();
    ajax_list_currentLetters[inputObj.name] = inputObj.value;
    if(!ajax_optionDiv){
      ajax_optionDiv = document.createElement('DIV');
      ajax_optionDiv.id = 'ajax_listOfOptions';  
      document.body.appendChild(ajax_optionDiv);
      
      if(ajax_list_MSIE){
        ajax_optionDiv_iframe = document.createElement('IFRAME');
        ajax_optionDiv_iframe.border='0';
        ajax_optionDiv_iframe.style.width = ajax_optionDiv.clientWidth + 'px';
        ajax_optionDiv_iframe.style.height = ajax_optionDiv.clientHeight + 'px';
        ajax_optionDiv_iframe.id = 'ajax_listOfOptions_iframe';
        
        document.body.appendChild(ajax_optionDiv_iframe);
      }
      
      var allInputs = document.getElementsByTagName('INPUT');
      for(var no=0;no<allInputs.length;no++){
        if(!allInputs[no].onkeyup)allInputs[no].onfocus = ajax_options_hide;
      }      
      var allSelects = document.getElementsByTagName('SELECT');
      for(var no=0;no<allSelects.length;no++){
        allSelects[no].onfocus = ajax_options_hide;
      }

      var oldonkeydown=document.body.onkeydown;
      if(typeof oldonkeydown!='function'){
        document.body.onkeydown=ajax_option_keyNavigation;
      }else{
        document.body.onkeydown=function(){
          oldonkeydown();
        ajax_option_keyNavigation() ;}
      }
      var oldonresize=document.body.onresize;
      if(typeof oldonresize!='function'){
        document.body.onresize=function() {ajax_option_resize(inputObj); };
      }else{
        document.body.onresize=function(){oldonresize();
        ajax_option_resize(inputObj) ;}
      }
        
    }
    
    if(inputObj.value.length<minimumLettersBeforeLookup){
      ajax_options_hide();
      return;
    }
        

    ajax_optionDiv.style.top = (ajax_getTopPos(inputObj) + inputObj.offsetHeight + ajaxBox_offsetY) + 'px';
    ajax_optionDiv.style.left = (ajax_getLeftPos(inputObj) + ajaxBox_offsetX) + 'px';
    if(ajax_optionDiv_iframe){
      ajax_optionDiv_iframe.style.left = ajax_optionDiv.style.left;
      ajax_optionDiv_iframe.style.top = ajax_optionDiv.style.top;      
    }
    
    ajax_list_activeInput = inputObj;
    ajax_optionDiv.onselectstart =  ajax_list_cancelEvent;
    currentListIndex++;
    if(ajax_list_cachedLists[paramToExternalFile][inputObj.value.toLowerCase()]){
      ajax_option_list_buildList(inputObj.value,paramToExternalFile,currentListIndex);      
    }else{

      var tmpIndex=currentListIndex/1;
      ajax_optionDiv.innerHTML = '';
      var ajaxIndex = ajax_list_objects.length;
      ajax_list_objects[ajaxIndex] = new sack();
      var url = '';
      if (nItemID>0)
        url = ajax_list_externalFile + '?item_id=' + nItemID + '&search=' + inputObj.value.replace(" ","+");
      else
        url = ajax_list_externalFile + '?cat_id=' + nCatID + '&search=' + inputObj.value.replace(" ","+");
      ajax_list_objects[ajaxIndex].requestFile = url;  // Specifying which file to get
      ajax_list_objects[ajaxIndex].onCompletion = function(){ ajax_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile,tmpIndex); };  // Specify function that will be executed after file has been found
      ajax_list_objects[ajaxIndex].runAJAX();    // Execute AJAX function    
    }
    
      
  }
  
  function ajax_option_keyNavigation(e)
  {
    if(document.all)e = event;
    
    if(!ajax_optionDiv)return;
    if(ajax_optionDiv.style.display=='none')return;
    
    if(e.keyCode==38){  // Up arrow
      if(!ajax_list_activeItem)return;
      if(ajax_list_activeItem && !ajax_list_activeItem.previousSibling)return;
      ajax_options_rollOverActiveItem(ajax_list_activeItem.previousSibling,true);
    }
    
    if(e.keyCode==40){  // Down arrow
      if(!ajax_list_activeItem){
        ajax_options_rollOverActiveItem(ajax_list_optionDivFirstItem,true);
      }else{
        if(!ajax_list_activeItem.nextSibling)return;
        ajax_options_rollOverActiveItem(ajax_list_activeItem.nextSibling,true);
      }
    }
    
    if(e.keyCode==13 || e.keyCode==9){  // Enter key or tab key
      if(ajax_list_activeItem && ajax_list_activeItem.className=='optionDivSelected')ajax_option_setValue(false,ajax_list_activeItem);
      if(e.keyCode==13)return false; else return true;
    }
    if(e.keyCode==27){  // Escape key
      ajax_options_hide();      
    }
  }
  
  
  document.documentElement.onclick = autoHideList;
  
  function autoHideList(e)
  {
    if(document.all)e = event;
    
    if (e.target) source = e.target;
      else if (e.srcElement) source = e.srcElement;
      if (source.nodeType == 3) // defeat Safari bug
        source = source.parentNode;    
    if(source.tagName.toLowerCase()!='input' && source.tagName.toLowerCase()!='textarea')ajax_options_hide();
    
  }