/** nav menu hover function */
var menu=function(){
	var t=15,z=50,s=6,a;
	function dd(n){this.n=n; this.h=[]; this.c=[]}
	dd.prototype.init=function(p,c){
		a=c; var w=document.getElementById(p), s=w.getElementsByTagName('ul'), l=s.length, i=0;
		for(i;i<l;i++){
			var h=s[i].parentNode; this.h[i]=h; this.c[i]=s[i];
			h.onmouseover=new Function(this.n+'.st('+i+',true)');
			h.onmouseout=new Function(this.n+'.st('+i+')');
		}
	}
	dd.prototype.st=function(x,f){
		var c=this.c[x], h=this.h[x], p=h.getElementsByTagName('a')[0];
		clearInterval(c.t); c.style.overflow='hidden';
		if(f){
			p.className+=' '+a;
			if(!c.mh){c.style.display='block'; c.style.height=''; c.mh=c.offsetHeight; c.style.height=0}
			if(c.mh==c.offsetHeight){c.style.overflow='visible'}
			else{c.style.zIndex=z; z++; c.t=setInterval(function(){sl(c,1)},t)}
		}else{p.className=p.className.replace(a,''); c.t=setInterval(function(){sl(c,-1)},t)}
	}
	function sl(c,f){
		var h=c.offsetHeight;
		if((h<=0&&f!=1)||(h>=c.mh&&f==1)){
			if(f==1){c.style.filter=''; c.style.opacity=1; c.style.overflow='visible'}
			clearInterval(c.t); return
		}
		var d=(f==1)?Math.ceil((c.mh-h)/s):Math.ceil(h/s), o=h/c.mh;
		c.style.opacity=o; c.style.filter='alpha(opacity='+(o*100)+')';
		c.style.height=h+(d*f)+'px'
	}
	return{dd:dd}
}();

var menuSide=function(){
	var t=15,z=50,s=6,b;
	function ee(n){this.n=n; this.h=[]; this.c=[]}
	ee.prototype.init=function(p,c){
		b=c; var w=document.getElementById(p), s=w.getElementsByTagName('ul'), l=s.length, i=0;
		for(i;i<l;i++){
			var h=s[i].parentNode; this.h[i]=h; this.c[i]=s[i];
			h.onmouseover=new Function(this.n+'.sa('+i+',true)');
			h.onmouseout=new Function(this.n+'.sa('+i+')');
		}
	}
	ee.prototype.sa=function(x,f){
		var c=this.c[x], h=this.h[x], p=h.getElementsByTagName('a')[0];
		clearInterval(c.t); c.style.overflow='hidden';
		if(f){
			p.className+=' '+b;
			if(!c.mh){c.style.display='block'; c.style.height=''; c.mh=c.offsetHeight; c.style.height=0}
			if(c.mh==c.offsetHeight){c.style.overflow='visible'}
			else{c.style.zIndex=z; z++; c.t=setInterval(function(){sl(c,1)},t)}
		}else{p.className=p.className.replace(b,''); c.t=setInterval(function(){sl(c,-1)},t)}
	}
	function sl(c,f){
		var h=c.offsetHeight;
		if((h<=0&&f!=1)||(h>=c.mh&&f==1)){
			if(f==1){c.style.filter=''; c.style.opacity=1; c.style.overflow='visible'}
			clearInterval(c.t); return
		}
		var d=(f==1)?Math.ceil((c.mh-h)/s):Math.ceil(h/s), o=h/c.mh;
		c.style.opacity=o; c.style.filter='alpha(opacity='+(o*100)+')';
		c.style.height=h+(d*f)+'px'
	}
	return{ee:ee}
}();

/** functions from sitepoint 
* http://www.sitepoint.com/article/javascript-from-scratch/2/
* addLoadListener used to initiate rss fetch
*/
function addLoadListener(fn) 
{ 
 if (typeof window.addEventListener != 'undefined') 
 { 
   window.addEventListener('load', fn, false); 
 } 
 else if (typeof document.addEventListener != 'undefined') 
 { 
   document.addEventListener('load', fn, false); 
 }
 else if (typeof window.attachEvent != 'undefined') 
 { 
   window.attachEvent('onload', fn); 
 } 
 else 
 { 
   var oldfn = window.onload; 
   if (typeof window.onload != 'function') 
   { 
     window.onload = fn; 
   } 
   else 
   { 
     window.onload = function() 
     { 
       oldfn(); 
       fn(); 
     };
   } 
 } 
}

/* set nav column height */
function nav_height()
{
	n = document.getElementById('side_navigation_wrapper');
	c = document.getElementById('content');
	
	//content height including padding
	if(c.offsetHeight){ 
		height = c.offsetHeight;
	} 
	else if(c.style.pixelHeight){ 
		height = c.style.pixelHeight;
	}
	else
	{
		height= c.clientHeight;
	}
	
	height=height-44; //hardcoded allowance for padding
	n.style.height = height + 'px';
	return;
}

addLoadListener(nav_height);