rem:  data.observer = null; 
add:  if ( data ) {  var op = data; data = null; 
context: function onUnload() {    // Unhook observer.    data.observer = null;    // See if we completed normally (i.e., are closing ourself).    if ( !completed ) {        // Terminate transfer.        data.Stop();    }}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/5a7112f3dd04403d5e898b73570153b0714ab350/downloadProgress.js/clean/xpfe/components/xfer/resources/downloadProgress.js