/* 

	Easy Scroll v1.0
	written by Alen Grakalic, provided by Css Globe (cssglobe.com)
	please visit http://cssglobe.com/post/1495/easy-scroll-accessible-content-scroller
	
*/

this.easyscroll = function(){
	
	// id of the container element 
	var id = "scrollContent";
	
	if($('#'+id).length > 0){
		// navigation buttons text
		var nav = [" ", " ", " "];
		
		//	id for each navigation button (OPTIONAL)
		var navId = ["btnUp", "btnReset", "btnDown"];
	
		// movement speed
		var speed = 5;
		
		// desired height of the container element (in pixels)
		var height = 440;
		
		//
		// END CONFIG
		// do not edit below this line (unless you want to of course :) )
		//
	
		var obj = document.getElementById(id);
		
		obj.up = false;
		obj.down = false;
		obj.fast = false;
	
		var container = document.createElement("div");
		var parent = obj.parentNode;
		container.id="easyscroll";
		parent.insertBefore(container,obj);
		parent.removeChild(obj);	
		
		/*
		container.style.position = "relative";
		container.style.height = height + "px";
		container.style.overflow = "hidden";
		*/
		obj.style.position = "absolute";
		obj.style.top = "0";
		obj.style.left = "0";
		container.appendChild(obj);
		
		var btns = new Array();
		var ul = document.createElement("ul");
		ul.id="easyscrollnav";
		for (var i=0;i<nav.length;i++){
			var li = document.createElement("li");
			li.innerHTML = nav[i];
			li.id = navId[i];
			btns.push(li);
			ul.appendChild(li);
		};
		parent.insertBefore(ul,container);
		
		btns[0].onmousedown = function(){
			obj.up = true;
			this.className = "over";
		};
		btns[0].onmouseup = function(){
			obj.up = false;
			this.className = "";
		};		
		
		btns[1].onmouseover = function(){ 		
			this.className = "over";
		};	
		btns[1].onmouseout = function(){ 		
			this.className = "";
		};		
	
		btns[1].onclick = function(){ 		
			obj.style.top = "0px";
		};		
		btns[2].onmousedown = function(){
			obj.down = true;
			this.className = "over";		
		};
		btns[2].onmouseup = function(){
			obj.down = false;
			this.className = "";
		};		
			
		this.start = function(){				
			var newTop;
			var objHeight = obj.offsetHeight;
			var top = obj.offsetTop;
			var fast = (obj.fast) ? 2 : 1;
			if(obj.down){		 
				newTop = ((objHeight+top) > height) ? top-(speed*fast) : top;	
				obj.style.top = newTop + "px";
			};	
			if(obj.up){		 
				newTop = (top < 0) ? top+(speed*fast) : top;
				obj.style.top = newTop + "px";
			};
		};	
		obj.interval = setInterval("start()",50);	
		
		// hide nav if content to small
		if($('#scrollContent').height() < height) $('#easyscrollnav').hide();
	}
};


//
// script initiates on page load. 
//

this.addEvent = function(obj,type,fn){
	if(obj.attachEvent){
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn](window.event );}
		obj.attachEvent('on'+type, obj[type+fn]);
	} else {
		obj.addEventListener(type,fn,false);
	};
};
addEvent(window,"load",easyscroll);