// Calcula a posição X de obj
function findPosX(obj)
{
    var curleft = 0;
    if(obj.offsetParent)
        while(1) 
        {
            curleft += obj.offsetLeft;
            if(!obj.offsetParent)
                break;
            obj = obj.offsetParent;
        }
    else if(obj.x)
        curleft += obj.x;
    return curleft;
}

// Calcula a posição Y de obj
function findPosY(obj)
{
    var curtop = 0;
    if(obj.offsetParent)
        while(1)
        {
            curtop += obj.offsetTop;
            if(!obj.offsetParent)
                break;
            obj = obj.offsetParent;
        }
    else if(obj.y)
        curtop += obj.y;
    return curtop;
}

function setPosition(divInfo, spanShowInfo)
{       
    var top = findPosY(spanShowInfo) + 10 + spanShowInfo.clientHeight + "px";
    var left = findPosX(spanShowInfo) + "px";
    
    divInfo.style.top = top;
    divInfo.style.left = left;
}