var topPos = 0;
var interValSet;
var finalPos = 0;
var speed = 25;
function scrollContentDiv(id, contentid, command)
{

    var offsetContainer = document.body.offsetHeight;
    var offsetContent = document.getElementById(contentid).offsetHeight;
    var maxScroll = offsetContent - offsetContainer; 
    
    if(offsetContent > offsetContainer)
    {
        //document.getElementById(contentid).style.position = "relative";
        if(command == "down")
        {
            if(-maxScroll <= (topPos - speed))
            {   
                topPos = topPos - speed;
                document.getElementById(contentid).style.top = topPos+"px";                
            }
            else
            {
                document.getElementById(contentid).style.top = -maxScroll+"px";
            }
        }
        else if(command == "up")
        {
           if(topPos == 0)
            {
                //exit
            }
            else
            {
                topPos = topPos + speed;
                document.getElementById(contentid).style.top = topPos+"px";
            }
        }
    }
    else if(offsetContent < offsetContainer || offsetContent == offsetContainer)
    {
        
    }
}
function scrInterval(id, contentid, command)
{
    document.getElementsByTagName("body")[0].style.overflowY = "auto";
    interValSet = setInterval("scrollContentDiv('"+id+"', '"+contentid+"', '"+command+"')", 10);
}
function stpInterval()
{
    
    try{
        clearInterval(interValSet);
    }catch(err){}
    document.getElementsByTagName("body")[0].style.overflowY = "hidden";
}