var include_pending = 0;
var include_ready = null;
document.includes = [];
document.includeQueue = [];

function include_once(path,onload) {

	if (document.includes && document.includes[path.toLowerCase()]) {
		//file is already included;
		if (onload) {
			onload();
		}
	}
	else {
		include(path,onload);
	}
}


//this include function implements a queued loading mechanism
//to ensure that script files are loaded in the same order as they are defined in script.
//this helps with some issues of loading jquery plugins before jquery is actually ready.
function include(a, onload) {
	if (typeof(a) === 'function') {
		if (include_pending == 0) {
			a();

			return true;
		}
		else {
			include_ready = a;
			return false;
		}
	}
	
	var path = a;
	
	if (!document.includes) {
		document.includes = [];
	}
	
	document.includes[path.toLowerCase()] = {};
	document.includes[path.toLowerCase()].loaded = false;
	
	var scr = document.createElement('script');
	scr.onload = scr.onreadystatechange = function (ev) {
		var cont = false;
		
		if (!this.readyState || this.readyState === "loaded" || this.readyState === "complete") {
			cont = true;
		}
		
		if (cont) {
			include_pending--;
			
			if (this.onloadhandler) {
				this.onloadhandler();
			}
			
			if (document.includeQueue.length) {
				var queuedScr = document.includeQueue.shift();
				
				document.getElementsByTagName('head')[0].appendChild(queuedScr);
				include_pending++;
			}

			if (include_pending == 0 && include_ready) {
				include_ready();
			}
		}
	};
	
	scr.onloadhandler = onload;
	scr.setAttribute('src',path);
	scr.setAttribute('language', 'javascript');
	scr.setAttribute('type', 'text/javascript');

	if (!include_pending) {
		//just load this right away
		document.getElementsByTagName('head')[0].appendChild(scr);
		include_pending++;
	}
	else {
		//queue loading until the previous include file is loaded
		document.includeQueue.push(scr);
	}
}

function include_css(path) {
	var head = document.getElementsByTagName('head')[0];
	var link = document.createElement('link');
	link.rel = "stylesheet"
	link.type = "text/css"
	link.href = path;

	head.appendChild(link);
}

function alert_includes(){
	var tmp = '';
	for (key in document.includes){
		tmp += key + '\n';
	}
	
	alert(tmp);
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}