rem: soundUrlLocation.value = document.getElementById("mail.biff.play_sound.url").value; soundUrlLocation.label = this.convertURLToLocalFile(soundUrlLocation.value).leafName; soundUrlLocation.image = "moz-icon: 
add: soundUrlLocation.value = document.getElementById("mail.biff.play_sound.url").value; if (soundUrlLocation.value) { soundUrlLocation.label = this.convertURLToLocalFile(soundUrlLocation.value).leafName; soundUrlLocation.image = "moz-icon: } 
context:   readSoundLocation: function()  {    var soundUrlLocation = document.getElementById("soundUrlLocation");    soundUrlLocation.value = document.getElementById("mail.biff.play_sound.url").value;         soundUrlLocation.label = this.convertURLToLocalFile(soundUrlLocation.value).leafName;    soundUrlLocation.image = "moz-icon://" + soundUrlLocation.label + "?size=16";    return undefined;  },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/08583fc06c3958b78704c9867902aa8efbf6b433/notifications.js/buggy/mail/components/preferences/notifications.js