var prevOnclick = null;
var prevElem = null;

function showPopup( elem, text, width, height )
{
    var popupDiv = document.getElementById("divPopUp");
    var popupDivText = document.getElementById("divPopUpText");
    
    var x = findPosX(elem);
    var y = findPosY(elem);
    
    popupDiv.style.left = (x + width) + "px";
    popupDiv.style.top = (y + height) + "px";
    popupDivText.innerHTML = text;
    popupDiv.style.display = "block";
}

function closePopup()
{
    var popupDiv = document.getElementById("divPopUp");
    popupDiv.style.display = "none";
}