function yo()
{
var path='c:\\windows\\notepad.exe';
var arguments=['c:\\aa.txt'];

var file = Components.classes['@mozilla.org/file/local;1']
.createInstance(Components.interfaces.nsILocalFile);
var process = Components.classes['@mozilla.org/process/util;1']
.getService(Components.interfaces.nsIProcess);
file.initWithPath(path);
process.init(file);
process.run(false,arguments,arguments.length);
}

yo();