Commonly used regular expression encyclopedia, mobile phone, telephone, mailbox, ID card (the most stringent verification), IP address, URL, date, etc., the general front desk JS verification, here is enough ... __ database

<script type= "Text/javascript" >
/*
* Mobile Phone number format
* Only numbers starting with 13, 15, 18 are allowed
* such as: 13012345678, 15929224344, 18201234676
*/
var regmobile=/^1[3,5,8]\d{9}$/;

/*
* Fixed phone number format
* Because the fixed telephone format is more complex, the situation is more, the main validation of the following types
* such as: 010-12345678, 0912-1234567, (010)-12345678, (0912) 1234567, (010) 12345678, (0912)-1234567, 01012345678, 09121234567
*/
var regphone=/^ (^0\d{2}-?\d{8}$) | (^0\d{3}-?\d{7}$) | (^\ (0\d{2}\)-?\d{8}$) | (^\ (0\d{3}\)-?\d{7}$) $/;

/*
* Email Email
* such as: zhangsan@163.com, Li-si@236.net, Wan_gwu999@SEED.NET.TW
*/
var regemail=/^ ([a-za-z0-9]+[_|\-|\.]?) *[a-za-z0-9]+@ ([a-za-z0-9]+[_|\-|\.]?) *[a-za-z0-9]+ (\.[ a-za-z]{2,3}) +$/;

/*
 * ID 15-bit encoding rule: dddddd yymmdd xx p
 * dddddd:6 bit region code
 * YYMMDD: Year of birth (two-year) month, such as: 910215
&NB sp;* XX: Sequential encoding, System generation, unable to determine
 * p: Sex, odd number for male, even number as female
 *
 * ID 18-bit encoding rule: dddddd yyyymmdd xxx y
 * Dddddd:6-bit region code
 * YYYYMMDD: Year of birth (four-year) month, such as: 19910215
 * XXX: Sequential encoding, System generation, cannot be determined, odd for men, even for women
 * y: Parity code, The bit value can be computed with the first 17 digits to obtain the
 *
 * The first 17 digits weighted factor is Wi = [7, 9, 5, 8, 4, 2, 1, 6, 3, 7, 9, 5, 8, 4,]
&nbs p;* verification bit Y = [1, 0, 9, 8, 7, 6, 5, 4, 3, 2]
 * If the verification code happens to be 10, in order to ensure that the ID card is 18, then the 18th bit will be replaced with x
 * check bit formula: Y_p = MoD (∑ (AIXWI), one)
 * I for ID number 1 ... 17 bits; Y_p is the checksum code y where the checksum code array position
 */
Function Validateidcard (idcard) {
&NBSP;//15 bit and 18-bit ID number regular expression
 var regidcard=/^ (^[1-9]\d{7} (0\d) | ( 1[0-2])) (([0|1|2]\d) |3[0-1]) \d{3}$) | (^[1-9]\d{5}[1-9]\d{3} (0\d) | ( 1[0-2])) (([0|1|2]\d) |3[0-1]) ((\d{4}) |\d{3}[xx]) $/;

If you pass this validation, the ID card format is correct, but the accuracy needs to be calculated
if (Regidcard.test (Idcard)) {
if (idcard.length==18) {
var idcardwi=new Array (7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); Save the first 17-bit weighting factor in an array
var idcardy=new Array (1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2); This is divided by 11, the possible resulting 11-bit remainder, the CAPTCHA, and the number of groups
var idcardwisum=0; Used to preserve the sum of the first 17 of their well-behaved weighted factors.
for (Var i=0;i<17;i++) {
Idcardwisum+=idcard.substring (i,i+1) *idcardwi[i];
}

Var idcardmod=idcardwisum%11;//calculates the location of the array where the checksum code is located
var idcardlast=idcard.substring (17);/Get the last ID number

If equal to 2, then the check code is 10, the last one of the ID number should be X
if (idcardmod==2) {
if (idcardlast== "X" | | idcardlast== "X") {
Alert ("Congratulations passed the test.") ");
}else{
Alert ("Wrong ID number.") ");
}
}else{
Match the calculated verification code with the last ID number, if consistent, the indication is passed, otherwise the invalid ID number
if (Idcardlast==idcardy[idcardmod]) {
Alert ("Congratulations passed the test.") ");
}else{
Alert ("Wrong ID number.") ");
}
}
}
}else{
Alert ("ID card format is not correct!");
}
}

/*
* Only a positive integer
*/
var regnum=/^\d+$/;

/*
* Postal Code
*/
var regpostcode=/^\d{6}$/;

/*
* User Name
* Can only be alphanumeric underline, and start with a letter (5-16-bit)
*/
var regusername=/^[a-za-z]\w{4,15}$/;

/*
* IP Address
* such as: 192.168.1.102
*/
var regip=/^ (([1-9]\d?) | (1\d{2}) | (2[0-4]\d) | (25[0-5]) \.) {3} ([1-9]\d?) | (1\d{2}) | (2[0-4]\d) | (25[0-5]) $/;

/*
* Can only be Chinese characters
*/
var regchinesechar=/^[\u4e00-\u9fa5]+$/;

/*
* Web site
* Only allow HTTP, HTTPS, FTP these three kinds
* such as: http://www.baidu.com
*/
var regweb=/^ ([Hh][tt]{2}[pp][ss]?) | ([ff][tt][pp]) \:\/\/[ww]{3}\. [\w-]+\.\w{2,4} (\/.*) $/;

/*
* Date Format validation
* Because the date format is more, the main validation of the following types
* 2012-05-14, 2012/05/6, 2012.5.14, 20120528
*/
var regdate=/^[1-9]\d{3} ([-|\/|\.])? ((0\d) | ([1-9]) | (1[0-2]) \1 ([0|1|2]\d) | ( [1-9]) | 3[0-1]) $/;

/*
 * the method of calling the above regular expression
 * to verify the phone number format as an example
 */
Function Oncheck (tel) {
 if ( Regmobile.test (tel)) {
  alert ("Congratulations on verification.") ");
  
 }else{
  alert ("Malformed.") ");
 }
}
</script>