// JavaScript Document
var scrollTop=0;
var Height=0;
var up=true;
var down=true;


	
function scrolldown(o,d,c)
{
	
		if(Height==0)
		{
			Height=o.scrollHeight;
		}
		var top=o.firstChild.style.marginTop;
		top=top.substring(0,top.length-2); 
		if(-top<=d && top!="")
		o.firstChild.style.marginTop=(top*1)+d;
	
	
}
function scrollup(o,d,c)
{	
	
		if(Height==0)
		{
			Height=o.scrollHeight;
		}
		var top=o.firstChild.style.marginTop;
		top=top.substring(0,top.length-2);
		//alert(top);
		if(-top<=Height-d)
		o.firstChild.style.marginTop=top-d;
	
}