rem: newTodo.completedDate.reset(); 
add: newTodo.completedDate = null; 
context: function checkboxClick(thisTodo, completed){    var newTodo = thisTodo.clone().QueryInterface(Components.interfaces.calITodo);    if(completed) {        newTodo.completedDate.jsDate = new Date();        newTodo.percentComplete = 100;    } else {        newTodo.completedDate.reset();        if (newTodo.percentComplete == 100)            newTodo.percentComplete = 0;    }       doTransaction('modify', newTodo, newTodo.calendar, thisTodo, null);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/fa153894fc16274ccdd1ac0fcbb84027018dbff0/unifinderToDo.js/clean/calendar/resources/content/unifinderToDo.js