/* 

	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 = "escroll4";
	
	// navigation buttons text
	var nav = ["", ""];
	
	//	id for each navigation button (OPTIONAL)
	var navId = ["scroll-top", "scroll-bot"];

	// movement speed
	var speed = 6;
	
	// desired height of the container element (in pixels)
	var height = 390;
	
	//
	// END CONFIG
	// do not edit below this line (unless you want to of course :) )
	//

	var obj = document.getElementById(id);

	if (obj != null)
	{
		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();
		btns[0] = document.getElementById("scroll-top");
		btns[1] = document.getElementById("scroll-bot");
		
		//var ul = document.createElement("div");
		//ul.id="easyscrollnav";
		//for (var i=0;i<nav.length;i++){
		//	var li = document.createElement("div");
		//	//li.innerHTML = nav[i];
		//	li.id = navId[i];
		//	btns.push(li);
		//	ul.appendChild(li);
		//};
		
		//parent.insertBefore(ul,container);
		
		btns[0].onmouseover = function()
		{
			obj.up = true;
			this.className = "over";
		};
		btns[0].onmouseout = function()
		{
			obj.up = false;
			this.className = "";
		};		
		btns[1].onmouseover = function()
		{
			obj.down = true;
			this.className = "over";		
		};
		btns[1].onmouseout = function()
		{
			obj.down = false;
			this.className = "";
		};		
		btns[0].onmousedown = btns[1].onmousedown = function()
		{
			obj.fast = true;
		};	
		btns[0].onmouseup = btns[1].onmouseup = function()
		{
			obj.fast = false;
		};				
			
		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);		
	}
};


//
// 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);