var speed = 10;
var intervalID = 0;
var scrollspeed = 0;

function news(dir) {

	if (dir == 0) {
		window.clearInterval(intervalID);		
		scrollspeed = 0;
	} else if (scrollspeed == 0) {
		intervalID = window.setInterval("moveNews()",100);	
		scrollspeed = speed * dir;
		moveNews();		 		
	} //end else
	return false;
}

function moveNews() {
	obj = document.getElementById("newscontent").style;
	var nuMarginLeft = parseInt(obj.marginLeft) - scrollspeed;

	var MaxMargin = parseInt(document.getElementById("newsTable").style.width)-670;
	
	if (nuMarginLeft > 0) {
		nuMarginLeft = 0;
		window.clearInterval(intervalID);		
	}

	if (Math.abs(nuMarginLeft) > MaxMargin) {
		nuMarginLeft = -MaxMargin;
		window.clearInterval(intervalID);				
	}

	obj.marginLeft = nuMarginLeft+"px";
}