function showPopUp(strLink, nWidth, nHeight)
{

if((typeof WindowPopUp != "undefined") && (WindowPopUp != null))
WindowPopUp.close();

    WindowPopUp = window.open("pages/prieten.php?link=" + strLink, "image", "left="+parseInt((screen.width-nWidth)/2)+", top="+parseInt((screen.height-nHeight)/2)+", width="+nWidth+", height="+nHeight);
    if(WindowPopUp != null)
WindowPopUp.focus();
}