function hidepopup()
{
    var popupBox = document.getElementById("popupbox");

    popupBox.style.visibility = "invisible";
    popupBox.style.display = "none";
}

function popup(msg)
{
    var popupBox = document.getElementById("popupbox");
    var popupBoxText = document.getElementById("popupbox_text");
    var height = popupBox.clientHeight;
    var myoffset = 0;
    var posY = tempY;
    var posX = tempX;

    if(height == 0) height = popupHeight;
    else popupHeight = height;

    myoffset = height / 2;
    myoffset += 10;
    posY -= myoffset;

    popupBoxText.innerHTML = msg;



    posX = posX + 20;
    if(posY < 0) posY = 0;

    popupBox.style.top = posY; // IE: style.pixelLeft
    popupBox.style.left = posX;
    
    popupBox.style.visibility = "visible";
    popupBox.style.display = "";
    

}