//
// Accordion
//
var showmenu;

// Prototype Method to get the element based on ID
function $(d){
	return document.getElementById(d);
}

// set or get the current display style of the div
function dsp(d,v){
	if(v==undefined){
		return d.style.display;
	}else{
		d.style.display=v;
	}
}

// set or get the height of a div.
function sh(d,v){
	// if you are getting the height then display must be block to return the absolute height
	if(v==undefined){
		if(dsp(d)!='none'&& dsp(d)!=''){
			return d.offsetHeight;
		}
		viz = d.style.visibility;
		d.style.visibility = 'hidden';
		o = dsp(d);
		dsp(d,'block');
		r = parseInt(d.offsetHeight);
		dsp(d,o);
		d.style.visibility = viz;
		return r;
	}else{
		d.style.height=v;
	}
}
/*
* Variable 'S' defines the speed of the accordian
* Variable 'T' defines the refresh rate of the accordian
*/
s=7;
t=40;

//Collapse Timer is triggered as a setInterval to reduce the height of the div exponentially.
function ct(d){
	d = $(d);
	if(sh(d)>0){
		v = Math.round(sh(d)/d.s);
		v = (v<1) ? 1 :v ;
		v = (sh(d)-v);
		sh(d,v+'px');
		d.style.opacity = (v/d.maxh);
		d.style.filter= 'alpha(opacity='+(v*100/d.maxh)+');';
	}else{
		sh(d,0);
		dsp(d,'none');
		clearInterval(d.t);
	}
}

//Expand Timer is triggered as a setInterval to increase the height of the div exponentially.
function et(d){
	d = $(d);
	if(sh(d)<d.maxh){
		v = Math.round((d.maxh-sh(d))/d.s);
		v = (v<1) ? 1 :v ;
		v = (sh(d)+v);
		sh(d,v+'px');
		d.style.opacity = (v/d.maxh);
		d.style.filter= 'alpha(opacity='+(v*100/d.maxh)+');';
	}else{
		sh(d,d.maxh);
		clearInterval(d.t);
	}
}

// Collapse Initializer
function cl(d){
	if(dsp(d)=='block'){
		clearInterval(d.t);
		d.t=setInterval('ct("'+d.id+'")',t);
	}
}

//Expand Initializer
function ex(d){
	if(dsp(d)=='none'){
		dsp(d,'block');
		d.style.height='0px';
		clearInterval(d.t);
		d.t=setInterval('et("'+d.id+'")',t);
	}
}

// Removes Classname from the given div.
function cc(n,v){
  s=n.className.split(/\s+/);
	for(p=0;p<s.length;p++){
		if(s[p]==v+n.tc){
			s.splice(p,1);
			n.className=s.join(' ');
			break;
		}
	}
}

//Highlight the parent item (added by custom)
function hp(){
	var ph = showmenu.split("_")[0]+"_header";
	var phc = document.getElementById(ph);
	if(phc){
		phc.className += " highlight";
	}
}

//Accordian Initializer
function Accordian(d,s,tc){
	// get all the elements that have id as content
	l=$(d).getElementsByTagName('div');
	c=[];
	for(i=0;i<l.length;i++){
		h=l[i].id;
		if(h.substr(h.indexOf('_'),h.length)=='_content'){c.push(h);}
	}
	sel=null;

	//then search through headers
	for(i=0;i<l.length;i++){
		h=l[i].id;
		if(h.substr(h.indexOf('_'),h.length)=='_header'){
			d=$(h.substr(0,h.indexOf('_'))+'_content');
			if(d){
				if(d.id==showmenu){
					d.style.display='block';
					hp();
				}else
					d.style.display='none';
				d.style.overflow='hidden';
				d.maxh =sh(d);
				d.s=(s==undefined)? 7 : s;
				h=$(h);
				h.tc=tc;
				h.c=c;
				// set the onclick function for each header.
				h.onmouseover = function(){
					for(i=0;i<this.c.length;i++){
						cn=this.c[i];
						n=cn.substr(0,cn.indexOf('_'));
						if((n+'_header')==this.id){
							ex($(n+'_content'));
							n=$(n+'_header');
							cc(n,'__');
							n.className=n.className+' '+n.tc;
						}else{
							cl($(n+'_content'));
							cc($(n+'_header'),'');
						}
					}
					//setContent();
				}
				if(h.className.match(/selected+/)!=undefined){ sel=h;}
			}else{
				//only hightlight the parent item
				hp();
			}
		}
	}
	if(sel!=undefined){sel.onmouseover();}
}