/* 
	SearchField 
	written by Alen Grakalic, provided by Css Globe (cssglobe.com)
	please visit http://cssglobe.com/post/1202/style-your-websites-search-field-with-jscss/ for more info
	
	Ajax Functionality added by Richard Ireland (innotech labs)
*/
this.searchfield = function(){
	// CONFIG 
	
	// this is id of the search field you want to add this script to. 
	// You can use your own id just make sure that it matches the search field in your html file.
	var id = "s";
		
	// set to either true or false
	// when set to true it will generate search suggestions list for search field based on content of variable below
	var suggestion = true;
	
	//number of characters the user needs to enter before making the ajax request
	//(one letter searches can result in very large result sets
	//  causing getsuggest to take a long time to reply.)
	var charsNeeded = 2;

	// static list of suggestion options, separated by comma
	// replace with your own
	// var suggestionText = "abc, def, xyz"; 
	//       ^^^^ This is now grabbed by ajax

	//make sure field is defined first
	var field = document.getElementById(id);

	// Text you want to set as a default value of your search field.
	// moved to here so it can show what the search was last
	var defaultText = field.defaultValue;

	//initialize ajax
	var xmlHttp;
	var suggestionText = "";
	var url="searchfield/getsuggest.php?l=";
	var depth=0;
	var maxDepth=10; //max number of conncurent ajax calls awaiting response
 
	//xmlHttp=GetXmlHttpObject();
	//if (xmlHttp==null)  {   //exit silently if ajax not possible
	//  return;
	//}
//	xmlHttp.onreadystatechange= function () { pointer.stateChanged() } ;


	function stateChanged(xmlHttp, fv) { 
		depth--;
		if (depth<0) { depth=0; }
		suggestionText=xmlHttp.responseText;
		//the following was in the startList function
		var arr = getListItems(fv);
		createList(arr);
	}

	function GetXmlHttpObject()  {
	  var xmlHttp=null;
	  try  {  // Firefox, Opera 8.0+, Safari  
			 xmlHttp=new XMLHttpRequest();  
		   }
	  catch (e)  { // Internet Explorer 
		try   {
			  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
			  }
		catch (e)  {
				   xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
				   }
	  }
	  return xmlHttp;
	}

	//remaining code is mostly from the standard searchfield
	var classInactive = "sf_inactive";
	var classActive = "sf_active";
	var classText = "sf_text";
	var classSuggestion = "sf_suggestion";
	this.safari = ((parseInt(navigator.productSub)>=20020000)&&(navigator.vendor.indexOf("Apple Computer")!=-1));
	if(field && !safari){
		field.value = defaultText;
		field.c = field.className;		
		field.className = field.c + " " + classInactive;
		field.onfocus = function(){
			this.className = this.c + " "  + classActive;
			//this.value = (this.value == "" || this.value == defaultText) ?  "" : this.value;
		};
		field.onblur = function(){
			this.className = (this.value != "" && this.value != defaultText) ? this.c + " " +  classText : this.c + " " +  classInactive;
			this.value = (this.value != "" && this.value != defaultText) ?  this.value : defaultText;
			clearList();
		};
		if (suggestion){			
			var selectedIndex = 0;
						
			field.setAttribute("autocomplete", "off");
			var div = document.createElement("div");
			var list = document.createElement("ul");
			list.style.display = "none";
			div.className = classSuggestion;
			list.style.width = field.offsetWidth + "px";
			div.appendChild(list);
			field.parentNode.appendChild(div);	

			field.onkeypress = function(e){
				
				var key = getKeyCode(e);
		
				if(key == 13){ // enter
					selectList();
					selectedIndex = 0;
					return false;
				};	
			};
				
			field.onkeyup = function(e){
			
				var key = getKeyCode(e);
		
				switch(key){
				case 13:
					return false;
					break;			
				case 27:  // esc
					field.value = "";
					selectedIndex = 0;
					clearList();
					break;				
				case 38: // up
					navList("up");
					break;
				case 40: // down
					navList("down");		
					break;
				default:
					startList();			
					break;
				};
			};
			
			this.startList = function(){
				//new ajax code
				//the code that *was* here now gets executed when stateChanged fires
				if (field.value.length>0) {
					if ((field.value.length>=charsNeeded)&&(depth<maxDepth))	{
						depth++;
						xmlHttp = new GetXmlHttpObject();
						if (xmlHttp==null)  {   //exit silently if ajax not possible
						  return;
						}
						xmlHttp.onreadystatechange= function() {
							if (xmlHttp.readyState==4) {
								if (xmlHttp.status==200) {
									stateChanged(xmlHttp, field.value);
								}
							}	
						}
						xmlHttp.open("GET",url+encodeURIComponent(field.value),true);
						xmlHttp.send(null);
					}
				} else {
					clearList();
				}
			};
			
			this.getListItems = function(value){
				var arr = new Array();
				var src = suggestionText;
				//var src = src.replace(/, /g, ",");
				var arrSrc = src.split("|");  //fixed in the php
				for(i=0;i<arrSrc.length;i++){
					if(arrSrc[i].substring(0,value.length).toLowerCase() == value.toLowerCase()){
						arr.push(arrSrc[i]);
					};
				};				
				return arr;
			};
			
			this.createList = function(arr){				
				resetList();			
				if(arr.length > 0) {
					for(i=0;i<arr.length;i++){				
						li = document.createElement("li");
						a = document.createElement("a");
						a.href = "javascript:void(0);";
						a.i = i+1;
						a.innerHTML = arr[i];
						li.i = i+1;
						li.onmouseover = function(){
							navListItem(this.i);
						};
						a.onmousedown = function(){
							selectedIndex = this.i;
							selectList(this.i);		
							return false;
						};					
						li.appendChild(a);
						list.setAttribute("tabindex", "-1");
						list.appendChild(li);	
					};	
					list.style.display = "block";				

				} else {
					clearList();
				};
			};	
			
			this.resetList = function(){
				var li = list.getElementsByTagName("li");
				var len = li.length;
				for(var i=0;i<len;i++){
					list.removeChild(li[0]);
				};
			};
			
			this.navList = function(dir){			
				selectedIndex += (dir == "down") ? 1 : -1;
				li = list.getElementsByTagName("li");
				if (selectedIndex < 1) selectedIndex =  li.length;
				if (selectedIndex > li.length) selectedIndex =  1;
				navListItem(selectedIndex);
			};
			
			this.navListItem = function(index){	
				selectedIndex = index;
				li = list.getElementsByTagName("li");
				for(var i=0;i<li.length;i++){
					li[i].className = (i==(selectedIndex-1)) ? "selected" : "";
				};
			};
			
			this.selectList = function(){
				li = list.getElementsByTagName("li");	
				a = li[selectedIndex-1].getElementsByTagName("a")[0];
				field.value = a.innerHTML;
				clearList();
			};			
			
		};
	};
	
	this.clearList = function(){
		if(list){
			list.style.display = "none";
			selectedIndex = 0;
		};
	};		
	this.getKeyCode = function(e){
		var code;
		if (!e) var e = window.event;
		if (e.keyCode) code = e.keyCode;
		return code;
	};
	
};

// script initiates on page load. 

this.addEvent = function(obj,type,fn){
	if(obj.attachEvent){
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn](window.event );}
		obj.attachEvent('on'+type, obj[type+fn]);
	} else {
		obj.addEventListener(type,fn,false);
	};
};
addEvent(window,"load",searchfield);