function popup(url, wd, ht) {
  var features;
  features = "height="+ht+",width="+wd+",toolbar=no";
  window.open(url, null, features);
}

function mosaic2popup(url,width,height) {
  var features;
  features = 'toolbar=1,scrollbars=1,location=1,statusbar=0,menubar=1,resizable=1,width=' + width + ',height=' + height;
  window.open(url,null,features);
}