// Small scripts for the sirenian web site


// Menu functions
// Basic menu function - if clicked, make selected and un-select the rest

function menu_selection(id) {
  	e = id.parentNode;
	
	// Unselect all
	elements = e.getElementsByTagName('*');
	for (var i=0; i<elements.length; i++) {
		    elements[i].className='not_selected';
	}
	id.className='selected';
}

// function to show or hide some content
function toggle_child(id) {
	
	// find the content class from the parent
	var elements = id.getElementsByTagName('*');
	for (var i=0; i<elements.length; i++) {
		if (elements[i].className=='showing_foldable_content') {
			elements[i].className='hidden_foldable_content';
		}
		else if (elements[i].className=='hidden_foldable_content') {
			elements[i].className='showing_foldable_content';
		}
		if (elements[i].className=='control_hidden') {
			elements[i].className='control_showing';
			elements[i].innerHTML='more...';
		}
		else if (elements[i].className=='control_showing') {
			elements[i].className='control_hidden';
			elements[i].innerHTML='hide detail';
		}
	}
}



/***********************************************
* Dynamic Ajax Content- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/


var bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadedobjects=""
var rootdomain="http://"+window.location.hostname
var bustcacheparameter=""

function ajaxpage(url, containerid){
	var page_request = false
	if (window.XMLHttpRequest) // if Mozilla, Safari etc
		page_request = new XMLHttpRequest()
	else if (window.ActiveXObject){ // if IE
		try {
				page_request = new ActiveXObject("Msxml2.XMLHTTP")
			} 
		catch (e){
			try{
				page_request = new ActiveXObject("Microsoft.XMLHTTP")
			}
			catch (e){}
		}
	}
	else
		return false

	page_request.onreadystatechange=function(){
		loadpage(page_request, containerid)
	}

	if (bustcachevar) { //if bust caching of external page
		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
		page_request.open('GET', url+bustcacheparameter, true)
		page_request.send(null)
	}
}

function loadpage(page_request, containerid){
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
	document.getElementById(containerid).innerHTML=page_request.responseText
}

function loadobjs(){
	if (!document.getElementById)
		return
	
	for (i=0; i<arguments.length; i++){
		var file=arguments[i]
		var fileref=""
		if (loadedobjects.indexOf(file)==-1){ //Check to see if this object has not already been added to page before proceeding
			if (file.indexOf(".js")!=-1){ //If object is a js file
				fileref=document.createElement('script')
				fileref.setAttribute("type","text/javascript");
				fileref.setAttribute("src", file);
			}
			else if (file.indexOf(".css")!=-1){ //If object is a css file
				fileref=document.createElement("link")
				fileref.setAttribute("rel", "stylesheet");
				fileref.setAttribute("type", "text/css");
				fileref.setAttribute("href", file);
			}
		}	

		if (fileref!=""){
			document.getElementsByTagName("head").item(0).appendChild(fileref)
			loadedobjects+=file+" " //Remember this object as being already added to page
		}
	}
}