var slideTimeBetweenSteps = 30;

var scrollingContainer = false;
var scrollingContent = false;
var containerHeight;
var contentHeight;	

var contentObjects = new Array();
var originalslideSpeed = false;

function slideContent(containerId) {
	var topPos = contentObjects[containerId]['objRef'].style.top.replace(/[^\-0-9]/g,'');
	topPos = topPos - contentObjects[containerId]['slideSpeed'];
	if(topPos/1 + contentObjects[containerId]['contentHeight']/1<0)
		topPos = contentObjects[containerId]['containerHeight'];
	contentObjects[containerId]['objRef'].style.top = topPos + 'px';
	setTimeout('slideContent("' + containerId + '")',slideTimeBetweenSteps);
}

function stopSliding() {
	var containerId = this.id;
	contentObjects[containerId]['slideSpeed'] = 0;	
}

function restartSliding() {
	var containerId = this.id;
	contentObjects[containerId]['slideSpeed'] = contentObjects[containerId]['originalSpeed'];
}

function initSlidingContent(containerId,slideSpeed) {
      	scrollingContainer = document.getElementById(containerId);
	scrollingContent = scrollingContainer.getElementsByTagName('DIV')[0];
	scrollingContainer.style.position = 'relative';
	scrollingContainer.style.overflow = 'hidden';
	scrollingContent.style.position = 'relative';
	scrollingContent.style.float= 'left';
		
	scrollingContainer.onmouseover = stopSliding;
	scrollingContainer.onmouseout = restartSliding;
	
	originalslideSpeed = slideSpeed;
	
	scrollingContent.style.top = '0px';
	
	contentObjects[containerId] = new Array();
	contentObjects[containerId]['objRef'] = scrollingContent;
	contentObjects[containerId]['contentHeight'] = scrollingContent.offsetHeight; // 195
	contentObjects[containerId]['containerHeight'] = scrollingContainer.clientHeight; // 55
	contentObjects[containerId]['slideSpeed'] = slideSpeed;
	contentObjects[containerId]['originalSpeed'] = slideSpeed;
	slideContent(containerId);
}