JS Domain name (support level two domain name) URL validation function

JS Domain name (support level two domain name) URL validation function
Verify path (under Liunx)

function C_path (v) {
if (V.length >) return false;
var reg =/^ (/w+) {1,30}/$/;
return Reg.test (v);
}

Verify Domain Name

function C_zone (V,C_CN) {
var arr = v.split ('. ');
var SLD = Arr.shift ();
var TLD = Arr.join ('. ');
if (sld.length<3) return false;
if (c_cn===undefined) {
if (/bcnb/i.test (TLD) &&/(?: 64|89|sex)/i.test (SLD)) return false;
}
var reg =/^ (?: [0-9a-z]+ (?:-[0-9a-z]+) *.) +[a-z]{2,4}$/;
return Reg.test (v);
}

Verify level Two domain name

function C_second_zone (v) {
Return/^ (?!) bbsb|mailsb|mailb|forumb|ns1b|ns2b| [0-9a-z]*www[0-9a-z]*b) [0-9a-z]{4,8}$/i.test (v);
}

Verifying URLs in http://format

function C_url (v) {
Return/^http://([^/:]+) (:(d+))? (/.*) $/i.test (v);
}