function openGeneralWindow(url) {
     var width  = 360;
     var height = 440;
     var left   = (screen.width  - width) / 2;
     var top    = (screen.height - height) / 2;
     var params = 'width=' + width;
     params += ', height=' + height;
     params += ', top=' + top; 
     params += ', left=' + left;
     params += ', directories=no';
     params += ', location=no';
     params += ', menubar=no';
     params += ', resizable=no';
     params += ', scrollbars=no';
     params += ', status=no';
     params += ', toolbar=no';
    
    productPictureWindow = window.open(url, 'generalWindow', params);
    
    if (window.focus) {
        productPictureWindow.focus();
    }
    
    return false;
}