JavaScript Regular Expression Validation function code _ Regular expression

Using regular expressions to determine whether the Arabic numerals are 0-9

Copy Code code as follows:

function Regisdigit (fdata)
{
var reg = new RegExp ("^[0-9]$");
Return (Reg.test (fdata));
}

Use this expression to get the length of the string

Copy Code code as follows:

function Regdatalength (fdata)
{
var vallength = fdata.length;
var reg = new RegExp ("^[\u0391-\uffe5]$");
var result = 0;
for (i=0; i< vallength; i++)
{
if (Reg.test (Fdata.charat (i)))
{
result = 2;
}
Else
{
Result + +;
}
}
return result;
}

Apply an extension to determine whether a value

Copy Code code as follows:

function Regisnumber (fdata)
{
var reg = new RegExp ("^[-]?[ 0-9]+[\.]? [0-9]+$ ");
Return Reg.test (Fdata)
}

Verify that the email is correct

Copy Code code as follows:

function Regisemail (fdata)
{
var reg = new RegExp ("^[0-9a-za-z]+@[0-9a-za-z]+[\.] {1} [0-9a-za-z]+[\.]? [0-9a-za-z]+$ ");
Return Reg.test (Fdata);
}

Determine if the phone number is correct

Copy Code code as follows:

function Regisphone (fdata)
{
var reg =/^ (\+86)? (1[0-9]{10}) $/;
Return Reg.test (Fdata);
}

Determine if the input is a string consisting of a 0-9/A-z/A-Z

Copy Code code as follows:

function Isalphanumber (str)
{
var result=str.match (/^[a-za-z0-9]+$/);
if (result==null) return false;
return true;
}

Determines whether the input is a number--(numbers contain decimals)--

Copy Code code as follows:

function Isnumber (str)
{
return!isnan (str);
}

Determines whether the input is an integer

Copy Code code as follows:

function Isint (str)
{
var result=str.match (/^ (-|\+)? \d+$/);
if (result==null) return false;
return true;
}

Determine if the input is a valid long date format-"Yyyy-mm-dd HH:MM:SS" | | "Yyyy/mm/dd HH:MM:SS"

Copy Code code as follows:

function Isdatetime (str)
{
var result=str.match (/^ (\d{4}) (-|\/) (\d{1,2}) \2 (\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2);
if (result==null) return false;
var d= new Date (result[1], result[3]-1, result[4], result[5], result[6], result[7]);
Return (D.getfullyear () ==result[1]&& (D.getmonth () +1) ==result[3]&&d.getdate () ==result[4]& &d.gethours () ==result[5]&&d.getminutes () ==result[6]&&d.getseconds () ==result[7]);
}

Check for Yyyy-mm-dd | | Date format for YYYY/MM/DD

Copy Code code as follows:

function IsDate (str) {
var result=str.match (/^ (\d{4}) (-|\/) (\d{1,2}) \2 (\d{1,2}) $/);
if (result==null) return false;
var d=new Date (Result[1], result[3]-1, result[4]);
Return (D.getfullyear () ==result[1] && d.getmonth () +1==result[3] && d.getdate () ==result[4]);
}

Determine if the input is a valid e-mail message

Copy Code code as follows:

function Isemail (str)
{
var result=str.match (-\w+) | (/^\w+) | ( \.\w+)) *\@[a-za-z0-9]+ (\.| -) [a-za-z0-9]+) *\. [a-za-z0-9]+$/);
if (result==null) return false;
return true;
}

Remove the trailing spaces of a string

Copy Code code as follows:

function Trim (str) {
Return Str.replace (/(^\s*) | ( \s*$)/g, "");
}

Returns the actual length of the string, one Chinese character counts 2 lengths

Copy Code code as follows:

function strlen (str) {
Return Str.replace (/[^\x00-\xff]/g, "* *"). Length;
}

Matching China ZIP code (6-bit)

Copy Code code as follows:

function Ispostcode (str)
{
var result=str.match (/[1-9]\d{5} (?!) \d)/);
if (result==null) return false;
return true;
}

Match domestic phone number (0511-4405222 or 021-87888822)

Copy Code code as follows:

function Istell (str)
{
var result=str.match (/\d{3}-\d{8}|\d{4}-\d{7}/);
if (result==null) return false;
return true;
}

A checksum is an integer (0-10000)

Copy Code code as follows:

function Isint1 (str)
{
var result=str.match (/^[0-9]$|^ ([1-9]) ([0-9]) {0,3}$|^10000$/);
if (result==null) return false;
return true;
}

Match Tencent QQ number

Copy Code code as follows:

function isqq (str)
{
var result=str.match (/[1-9][0-9]{4,}/);
if (result==null) return false;
return true;
}

Matching ID (15-bit or 18-bit)

Copy Code code as follows:

function Isidcard (str)
{
var result=str.match (/\d{15}|\d{18}/);
if (result==null) return false;
return true;
}

Verify that the text is empty

Copy Code code as follows:

function Checknull (field,sval)
{
if (Field.value = "")
{
Alert ("Please fill in" + Sval +)! ");
Field.focus ();
return false;
}
return true;
}

Mask input Characters

Copy Code code as follows:

function Checkchar ()
{
var keycode = Event.keycode;
if (!) ( keycode>=48&&keycode<=57))
{
return false;
}
}