function $(id) {

if (typeof jQuery == 'undefined' || (typeof id == 'string' && document.getElementById(id))) {

return document.getElementById(id);

} else if (typeof id == 'object' || !/^\w*$http://www_qibosoft_comexec(id) ||

/^(body|div|span|a|input|textarea|button|img|ul|li|ol|table|tr|th|td)$http://www_qibosoft_comexec(id)){

return jQuery(id);

}

return null;

}