var startPos = 0;
var scrollPos = startPos;
var scrollSpeed = 30;
var intervalId;


window.onUnLoad = function (){
	clearInterval(intervalId);
}

function initNews(container){

	var n = document.getElementById(container);
	n.style.top = startPos + "px";
}

function overUp(wrapper,content){  
    
	var n = document.getElementById(content);
	var w = document.getElementById(wrapper);
	intervalId=setInterval("newsup('"+wrapper+"','"+content+"')",scrollSpeed);
}

function overDown(wrapper,content){
    //alert(wrapper+" "+content);
	intervalId=setInterval("newsdown('"+wrapper+"','"+content+"')",scrollSpeed);	
}

function clearNewsInterval(){
	clearInterval(intervalId);
}

function newsup(wrapper,content){   
	var n = document.getElementById(content);
	if (scrollPos < 0){
		scrollPos++;
		n.style.top = scrollPos + "px";
	}
}

function newsdown(wrapper,content){
	var n = document.getElementById(content);
	var w = document.getElementById(wrapper);
	if (scrollPos > -(n.offsetHeight-w.clientHeight)){
		scrollPos--;
		n.style.top = scrollPos + "px";
	}		
}