function ToggleVisibility(id) { 
    var pnl = document.getElementById(id);
    if (pnl.style.display == 'none') {
        pnl.style.display = 'block';
    } else {
        pnl.style.display = 'none'; 
    }
 }
function ShowPopup(url, height, width) 
 {
     posleft = (window.screen.Width / 2) - 265;
     postop = (window.screen.Height / 2) - 235;
     var args = 'height=' + height + ',width=' + width +
    ',toolbar=no,menubar=no,scrollbars=yes,location=no,top=' + postop + ', left=' + posleft;
     window.open(url, '_blank', args);
 }