/*

	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

*/


//id of the container element

function configurarScroll(id, height){

	// movement speed
	var speed = 4;

	//
	// END CONFIG
	// do not edit below this line (unless you want to of course :) )
	//

	var obj = $(id);

	obj.up = false;
	obj.down = false;
	obj.fast = false;

	var container = document.createElement("div");
	var parent = obj.parentNode;
	container.id="easyscroll"+id;
	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.push($('btnUp'));
	btns.push($('btnDown'));

	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);

};