Warning: require_once(jssdk.php) [function.require-once]: failed to open stream: No such file or directory in D:\wamp\www\weixin.bak1\device_scan_code.php(2) : eval()'d code(1) : eval()'d code on line 2

Fatal error: require_once() [function.require]: Failed opening required 'jssdk.php' (include_path='.;C:\php5\pear') in D:\wamp\www\weixin.bak1\device_scan_code.php(2) : eval()'d code(1) : eval()'d code on line 2