Common checksums in JavaScript such as domain names, cell phones, mailboxes, etc.

 javascript common validation such as: Verify the general domain name check, phone check, mailbox check, ID check, etc., the following is the specific implementation, interested friends can refer to the following

  Code as follows: <script type= "Text/javascript" > //Verify general domain name check   function Checkneturl () {  var neturl = document.getElementById ("Neturl"); //Verify generic domain names such as www.baidu.com  var regstr= "^" ([a-za-z0-9-]+.) {1,} (COM|NET|EDU|MIZ|BIZ|CN|CC) $ ";  var re=new RegExp (REGSTR); Create regular Expression Objects  //var re=/^ ([a-za-z0-9-]+.) {1,} (COM|NET|EDU|MIZ|BIZ|CN|CC) $/;  if (!re.exec (Neturl.value)) {//Verify that the string entered is compliant with rule   alert ("The URL address you entered is incorrect!") Correct format such as mail.brookes.com ");  Neturl.focus ();  return; } } //Cell phone checksum   function iphoneregexp () {  var iphone= document.getelementbyid ("iphone") .value;  var regstr= "^ ((13[0-9)) | ( 14[0-9]) | (15[^4,d]) | (18[0-9]) d{8}$ ";  var re=new RegExp (REGSTR);  if (!re.test (iphone)) {  alert (" specification error, correct format such as 152636363** (or 13, 14,18) "; } } //Mailbox checksum (also somewhat bugs)  /*function emailregexp () {  var email= document.getElementById ("email") .value;  var regstr= "^" ([a-za-z0-9u4e00-u9fa5]*[-_]?[ A-za-z0-9]) {1,}+@ ([a-za-z0-9]*[-_]?[ a-za-z0-9]+) +[.] [A-za-z] {2,3} ([.] [A-za-z] {2})? $ ";  var re=new RegExp (REGSTR);  if (!re.test (email)) {  alert (" specification error, correct format such as 152636363** (or 13, 14,18 mobile phone number) "; //iphone.focus (); } }*/ /ID check   function cardregexp () {  var card= document.getElementById ("card") .value;  var regstr= "(^d{15}$) | (^d{18}$) | (^d{17} (d| X|X) $ ";  var re=new RegExp (REGSTR);  if (!re.test (card)) {  alert (" Input is not valid, the correct format is: 4101821897020356** ");  } } //Hong Kong and Macao Provinces certificate   function Gangaocardregexp () {  var card= document.getelementbyid ("card"). value;  var regstr= "[A-z]{1,2}[0-9]{6}[(]{1}[a-z0-9]{1}[)]{1}";  var re=new RegExp (REGSTR);  if (! Re.test (card)) {  alert ("Hong Kong and Macao identity cards entered illegal!") Correct format such as: a15263* (E) "); } } //Disability certificate   function canjicardregexp () {  var card= document.getElementById ("card") .value;  var regstr= "(^d{22}$) | (^d{20}$) ";  var re=new RegExp (REGSTR);  if (!re.test (card)) {&nbsp Alert ("Invalid entry of disability certificate!");  } } //Postal code   function postcardregexp () {  var postcard= document.getelementbyid ("postcard") .value;  var regstr= "^[0-9]{6}$";  var re=new RegExp (REGSTR);  if (!re.test (postcard)) {  alert (" The input is illegal! Correct format such as 4500! ");  } } //Fax and fixed telephone checksum   function telregexp () {  var tel= document.getElementById ("tel"). Value;   var regstr= (^d{11}$) | ( ^d{12}$)) | (^d{3}-d{8}$) | (^d{4}-d{7}$) | (^d{4}-d{8}$) ";  var re=new RegExp (REGSTR);  if (!re.test (tel)) {  alert (" Write format Error!) Correct format such as 0511-44052** or 021-878888** "); } } //user famous school, the rules are as follows: //matching account number is legal (beginning of letter, allow 5-16 bytes, allow alphanumeric underline   function usernameregexp () {  var username= document.getelementbyid ("UserName") .value;  var regstr= "^[ a-za-z][a-za-z0-9_]{3,15}$ ";  var re=new RegExp (REGSTR);  if (!re.test (userName)) {  alert (" must begin with a letter, followed by 4-15 digits, letters or underscores! "); } } //checksum integer   function numregexp () {  var num= document. getElementById ("num") .value;  var regstr= "^[0-9]*[1-9][0-9]*$";  var re=new RegExp (REGSTR);  if (! Re.test (num)) {  alert ("Fill in malformed, correct format like: 8080"); } } //checksum decimal or integer   function numfontregexp () {   var num= document.getelementbyid ("num") .value;  var regstr= "^ ([0]{1,}) | ( [0-9] {1,}) [.] {1} [0-9] {1,}) | [0-9] {1,}$ ';  var re=new RegExp (REGSTR);  if (!re.test (num)) {  alert ("Fill in malformed, correctly formatted as 12.3"); } }  //Verify special characters ^[^%$&@]{1,}$  function strregexp () {  var str= document.getelementbyid ("str"). Value;   var regstr= "^[^%$&@]{1,}$";  var re=new RegExp (REGSTR);  if (!re.test (str)) {  alert (" Cannot contain special characters "); } } //Verify real name   function nameregexp () {  var name= document.getelementbyid (" name " ) .value;  var regstr= (^[a-za-z]{1} ([A-za-z_]) {2,20}) | ( ^[U4E00-U9FA5]{1}+[A-ZA-Z0-9U4E00-U9FA5]{1,14})) $ ";  var re=new RegExp (REGSTR);  if (!re.test (name)) {   Alert ("should be 2-15 Chinese characters or 3-21 EnglishLetter "); } } ////Verify passport   function huzhoaregexp () {  var huzhao= document.getelementbyid (" Huzhao ") .value;  var regstr=" ^ ((14) | ( 15) [0-9]{7}] | (g| s| D[0-9]{8}) | ((P.) | (S.) [0-9] {7}) $ ";  var re=new RegExp (REGSTR);  if (!re.test (Huzhao)) {  alert (" Passport input illegal, correct format such as: G00106556 "); }  } //Officer certificate   function junguanregexp () {  var junguan= document.getelementbyid ("Junguan"). Value;   var regstr= "^[u4e00-u9fa5]{1}d{7}$";  var re=new RegExp (REGSTR);  if (!re.test (Junguan)) {  alert (The input is illegal!) Correct format such as: Sea 6042** "); } } //civilian cadre check   function junguanregexp () {  var wenzhi= document.getElementById ("Wenzhi") .value;  var regstr= "^[u4e00-u9fa5]{1} wen d{4,12}$";  var re=new RegExp ( REGSTR);  if (!re.test (Wenzhi)) {  alert ("Civilian cadre certificate input illegal!") Correct format such as: Guangwen 0816** "); } } //Soldier ID   function shibingregexp () {  var shibing= document.getElementById ("shibing") .value;  var regstr= "^[u4e00-u9fa5]{1,3}d{4,12}$ ';  var re=new RegExp (REGSTR);  if (!re.test (shibing)) {  alert ("Soldier card input illegal!") Correct format such as: E-176340** "); } } //Mobile phone and fixed-line check   function iphonetelregexp () {  var iphonetel= document.getElementById ("Iphonetel") .value;  var regstr= "((^d{11}$) | ( ^d{12}$)) | (^d{3}-d{8}$) | (^d{4}-d{7}$) | (^d{4}-d{8}$)) | (^ (13[0-9]) | (14[0-9]) | (15[^4,d]) | (18[0-9]) d{8}$) $ ";  var re=new RegExp (REGSTR);  if (!re.test (Iphonetel)) {  alert (" Phone number write error, does not conform to phone number specification (such as 0511-4405xxx or 15236565xxx), please re-fill in "); } }  </script>