/***********************************************

* Ajax Page Fetcher- by JavaScript Kit (www.javascriptkit.com)

***********************************************/



var ajaxpagefetcher={

loadingmessage: "<div style='background-image:url(loading.gif); width:100%; height:240px; background-position:center; background-repeat:no-repeat;'></div>",

//loadingmessage: "<font color=red style='font-family:verdana;'>Loading in progress...</font>",

exfilesadded: "",



connect:function(containerid, pageurl, bustcache, jsfiles, cssfiles){

	var page_request = false

	var bustcacheparameter=""

	if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc

		page_request = new XMLHttpRequest()

	else if (window.ActiveXObject){ // if IE6 or below

		try {

		page_request = new ActiveXObject("Msxml2.XMLHTTP")

		} 

		catch (e){

			try{

			page_request = new ActiveXObject("Microsoft.XMLHTTP")

			}

			catch (e){}

		}

	}

	else

		return false

	var ajaxfriendlyurl=pageurl.replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/") 

	page_request.onreadystatechange=function(){ajaxpagefetcher.loadpage(page_request, containerid, pageurl, jsfiles, cssfiles)}

	if (bustcache) //if bust caching of external page

		bustcacheparameter=(ajaxfriendlyurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()

	document.getElementById(containerid).innerHTML=ajaxpagefetcher.loadingmessage //Display "fetching page message"

	page_request.open('GET', ajaxfriendlyurl+bustcacheparameter, true)

	page_request.send(null)

},



loadpage:function(page_request, containerid, pageurl, jsfiles, cssfiles){

	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){

		document.getElementById(containerid).innerHTML=page_request.responseText

		for (var i=0; i<jsfiles.length; i++)

			this.loadjscssfile(jsfiles[i], "js")

		for (var i=0; i<cssfiles.length; i++)

			this.loadjscssfile(cssfiles[i], "css")

		this.pageloadaction(pageurl) //invoke custom "onpageload" event

	}

},



createjscssfile:function(filename, filetype){

	if (filetype=="js"){ //if filename is a external JavaScript file

		var fileref=document.createElement('script')

		fileref.setAttribute("type","text/javascript")

		fileref.setAttribute("src", filename)

	}

	else if (filetype=="css"){ //if filename is an external CSS file

		var fileref=document.createElement("link")

		fileref.setAttribute("rel", "stylesheet")

		fileref.setAttribute("type", "text/css")

		fileref.setAttribute("href", filename)

	}

	return fileref

},



loadjscssfile:function(filename, filetype){ //load or replace (if already exists) external .js and .css files

	if (this.exfilesadded.indexOf("["+filename+"]")==-1){ //if desired file to load hasnt already been loaded

		var newelement=this.createjscssfile(filename, filetype)

		document.getElementsByTagName("head")[0].appendChild(newelement)

		this.exfilesadded+="["+filename+"]" //remember this file as being added

	}

	else{ //if file has been loaded already (replace/ refresh it)

 	var targetelement=(filetype=="js")? "script" : (filetype=="css")? "link" : "none" //determine element type to create nodelist using

 	var targetattr=(filetype=="js")? "src" : (filetype=="css")? "href" : "none" //determine corresponding attribute to test for

 	var allsuspects=document.getElementsByTagName(targetelement)

 	for (var i=allsuspects.length; i>=0; i--){ //search backwards within nodelist for matching elements to remove

  	if (allsuspects[i] && allsuspects[i].getAttribute(targetattr)!=null && allsuspects[i].getAttribute(targetattr).indexOf(filename)!=-1){

   	var newelement=this.createjscssfile(filename, filetype)

   	allsuspects[i].parentNode.replaceChild(newelement, allsuspects[i])

  	}

		}

 }

},





pageloadaction:function(pageurl){

	this.onpageload(pageurl) //call customize onpageload() function when an ajax page is fetched/ loaded

},



onpageload:function(pageurl){

 //do nothing by default

},



load:function(containerid, pageurl, bustcache, jsfiles, cssfiles){

	var jsfiles=(typeof jsfiles=="undefined" || jsfiles=="")? [] : jsfiles

	var cssfiles=(typeof cssfiles=="undefined" || cssfiles=="")? [] : cssfiles

	this.connect(containerid, pageurl, bustcache, jsfiles, cssfiles)

}



} 







//End object



//Sample usage:

//1) ajaxpagefetcher.load("mydiv", "content.htm", true)

//2) ajaxpagefetcher.load("mydiv2", "content.htm", true, ["external.js"])

//3) ajaxpagefetcher.load("mydiv2", "content.htm", true, ["external.js"], ["external.css"])

//4) ajaxpagefetcher.load("mydiv2", "content.htm", true, ["external.js", "external2.js"])

//5) ajaxpagefetcher.load("mydiv2", "content.htm", true, "", ["external.css", "external2.css"])