/* 



	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 = "myContent";

	

	// navigation buttons text

	var nav = ["Scroll Up", "Scroll Down", "Reset"];

	

	//	id for each navigation button (OPTIONAL)

	var navId = ["btnUp", "btnDown", "btnReset"];



	// movement speed

	var speed = 5;

	

	// desired height of the container element (in pixels)

	var height = 290;

	

	//

	// 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].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;

	};		

	btns[2].onmouseover = function(){ 		

		this.className = "over";

	};	

	btns[2].onmouseout = function(){ 		

		this.className = "";

	};		

	btns[2].onclick = function(){ 		

		obj.style.top = "0px";

	};		

		

	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);