var mouseX = 0;
var mouseY = 0;
document.onmousemove = getMouseCoordinates;

function getMouseCoordinates(e)
{
    if (!e) // IE
    {
        mouseX = event.clientX + document.body.scrollLeft;
        mouseY = event.clientY + document.body.scrollTop;
    }
    else // NS
    {
        mouseX = e.pageX;
        mouseY = e.pageY;
    }
}

function showPurchase()
{
    var div = getObject("divPurchase");

    if (div.style.visibility == "visible")
    {
        hidePurchase();
        return;
    }

    div.style.left = "" + (getScreenCenterX() - 395) + "px";
    var yPos = getScreenCenterY() - 290;
    if (yPos < 0) yPos = 0;
    div.style.top = "" + yPos + "px";
    div.style.visibility = "visible";
}

function hidePurchase()
{
    var div = getObject("divPurchase");
    div.style.left = "-1000px";
    div.style.visibility = "hidden";
}

function hidePurchaseCloser()
{
    getObject("pPurchaseCloser").style.display = "none";
}

function closePurchase()
{
    getObject("purchaseComplete").value = "1";
    __doPostBack("", "");
}