var marqueeData = Array();

function initMarquee(_id, _height, _speed, _state) {
	
	marqueeData[_id] = Array();
	marqueeData[_id]['height'] = _height;
	marqueeData[_id]['offsetHeight'] = getById(_id).offsetHeight;
	marqueeData[_id]['speed'] = _speed;
	marqueeData[_id]['state'] = 0;
	
	marqueeData[_id]['timer'] = window.setTimeout("moveMarquee('" + _id + "')", 2000);
	
}

function moveMarquee(_id) {
	
	var height = marqueeData[_id]['height'];
	var offsetHeight = getById(_id).offsetHeight;
	var state = marqueeData[_id]['state'];
	var speed = marqueeData[_id]['speed'];
	
	var newstate = state + speed / 2;
	
	if(newstate > offsetHeight)
		newstate = -height;
	
	getById(_id).style.bottom = newstate + "px";
	
	marqueeData[_id]['state'] = newstate;
	
	marqueeData[_id]['timer'] = window.setTimeout("moveMarquee('" + _id + "')", 30);
	
}

function stopMarquee(_id) {
	
	window.clearTimeout(marqueeData[_id]['timer']);
	
}

function startMarquee(_id) {
	
	marqueeData[_id]['timer'] = window.setTimeout("moveMarquee('" + _id + "')", 500);
	
}