function OpenZipWindow()
{
    
    var value = document.getElementById('plc_lt_zoneWeeklyAd_weeklyadviewer_txtZip').value;
    var apos = location.href.indexOf('/');
    var lastpos = location.href.indexOf('/', (apos + 3)) + 1;
    var url;
    var width  = 800;
    var height = 600;
    var left   = (screen.width  - width)/2;
    var top    = (screen.height - height)/2;
    var params = 'width='+width+', height='+height;
    params += ', top='+top+', left='+left;
    params += ', directories=no';
    params += ', location=no';
    params += ', menubar=no';
    params += ', resizable=yes';
    params += ', scrollbars=no';
    params += ', status=no';
    params += ', toolbar=no'; 

    if (lastpos == -1)
    {
        
        url = location.href;
        
     }
     else
     {
        
        url = location.href.substring(0, lastpos);
            
     }
        
     if (value != "")
     {
        
        window.open(url + 'WeeklyAds/WeeklyAd.aspx?z=' + value, 'waw', params);
        
     }
     
    
}