//var searchUrl = "search2.php";
var searchUrl = "https://www.barcode.co.uk/search2.php";
var formName = "search";
var searchtermLast = '';
var pageLast = 0;

function testForEnter(e) {  
	var evt = e ? e:window.event;
  
	if (e.keyCode == 13) {      

	if (evt.preventDefault) evt.preventDefault();
	evt.returnValue = false;
	 
	xmlhttpPost(searchUrl, 0);
	 
	 return false;
		//return false;
		//e.cancelBubble = true;
		//e.returnValue = false;
	}
	
} 

function cancelDefaultAction(e) {
 var evt = e ? e:window.event;
 if (evt.preventDefault) evt.preventDefault();
 evt.returnValue = false;
 return false;
}

// Call the cancelDefaultAction() function
// to prevent the default browser response:

function handleEvent(e) {
 var evt = e ? e:window.event;

 // event handler code goes here

 return cancelDefaultAction(evt);
}

function xmlhttpPost(strURL, page) {
	var xmlHttpReq = false;
	var self = this;
	// Mozilla/Safari
	if (window.XMLHttpRequest) {
		self.xmlHttpReq = new XMLHttpRequest();
	}
	// IE
	else if (window.ActiveXObject) {
		self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
	}
	self.xmlHttpReq.open('POST', strURL, true);
	self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	self.xmlHttpReq.onreadystatechange = function() {
		if (self.xmlHttpReq.readyState == 4 && self.xmlHttpReq.status == 200) {
			updatepage(self.xmlHttpReq.responseText);
		}
	}
	self.xmlHttpReq.send(getquerystring(page));
}

function getquerystring(page) {
	var form = document.forms[formName];
	var searchterm = form.searchterm.value;
	var featured = form.featured.value;
	
	// 2014
	if (searchtermLast != searchterm) {
		page = 1;
	}
	
	searchtermLast = searchterm;
	pageLast = page;
	
	qstr = 'search=' + escape(searchterm);
	qstr += '&featured=' + escape(featured);
	if (page > 0) {
		qstr += "&page=" + page.toString();
	}
	
	return qstr;   // NOTE: no '?' before querystring
}

function deleteSearchTerm(s) {
	var form = document.forms[formName];
	var searchterm = form.searchterm.value;
	
	searchterm = replaceAll(searchterm, s, "");
	form.searchterm.value = searchterm;
	
	 xmlhttpPost(searchUrl, 1);
}

function replaceAll(string, token, newtoken) {
	if (token != newtoken) {
		while(string.indexOf(token) > -1) {
			string = string.replace(token, newtoken);
		}
	}
	return string;
}

function updatepage(str) {

	var myOb = eval('(' + str + ')');

	document.getElementById("navigation1").innerHTML = myOb['navigation'];
	document.getElementById("navigation2").innerHTML = myOb['navigation'];
	document.getElementById("results").innerHTML = myOb['results'];
	document.getElementById("summary").innerHTML = myOb['summary'];
	
}

function fnStartInit() {
	var state = document.readyState;
	if (state == 'interactive') {
		//init()
	} else if (state == 'complete') {
		//initOnCompleteLoad()
		xmlhttpPost(searchUrl, 1);
	}
}

(function() {

	//xmlhttpPost(searchUrl, 0);
	document.onreadystatechange = fnStartInit;

})();