JavaScript regular expression verification function code

Use regular expressions to determine whether it is an Arabic number of 0-9

Copy the codeThe code is as follows:

 
function regIsDigit(fData) 
{ 
var reg = new RegExp("^[0-9]$"); 
return ((fData)); 
} 

Use this expression to get the length of the string

Copy the codeThe code is as follows:

 
function regDataLength(fData) 
{ 
var valLength = ; 
var reg = new RegExp("^[\u0391-\uFFE5]$"); 
var result = 0; 
for(i=0; i< valLength; i++) 
{ 
if(((i))) 
{ 
result += 2; 
} 
else 
{ 
result ++; 
} 
} 
return result; 
} 

Apply extension to determine whether it is a numeric value

Copy the codeThe code is as follows:

 
function regIsNumber(fData) 
{ 
var reg = new RegExp("^[-]?[0-9]+[\.]?[0-9]+$"); 
return (fData) 
} 

Verify that the email is correct

Copy the codeThe code is 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 (fData); 
} 

Determine whether the mobile phone number is correct

Copy the codeThe code is as follows:

 
function regIsPhone(fData) 
{ 
var reg = /^(\+86)?(1[0-9]{10})$/; 
return (fData); 
} 

// Determine whether the input is a string composed of 0-9 / A-Z / a-z

Copy the codeThe code is as follows:

 
function isalphanumber(str) 
{ 
var result=(/^[a-zA-Z0-9]+$/); 
if(result==null) return false; 
return true; 
} 

// Determine whether the input is a number-(number contains decimals)-

Copy the codeThe code is as follows:

 
function isnumber(str) 
{ 
return !isNaN(str); 
} 

// Determine whether the input is an integer

Copy the codeThe code is as follows:

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

// Determine whether the input is valid long date format - "YYYY-MM-DD HH:MM:SS" || "YYYY/MM/DD HH:MM:SS"

Copy the codeThe code is as follows:

 
function isdatetime(str) 
{ 
var result=(/^(\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 (()==result[1]&&(()+1)==result[3]&&()==result[4]&&()==result[5]&&()==result[6]&&()==result[7]); 
} 

// Check whether it is YYYY-MM-DD || YYYY/MM/DD date format

Copy the codeThe code is as follows:

 
function isdate(str){ 
var result=(/^(\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 (()==result[1] && ()+1==result[3] && ()==result[4]); 
} 

// Determine whether the input is valid for email

Copy the codeThe code is as follows:

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

// Remove the spaces at the beginning and end of the string

Copy the codeThe code is as follows:

 
function trim(str){ 
return (/(^\s*)|(\s*$)/g, ""); 
} 

// Return the actual length of the string, one Chinese character calculates 2 lengths

Copy the codeThe code is as follows:

 
function strlen(str){ 
return (/[^\x00-\xff]/g, "**").length; 
} 

//Match the Chinese postal code (6 digits)

Copy the codeThe code is as follows:

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

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

Copy the codeThe code is as follows:

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

//Check whether it is an integer (0-10000)

Copy the codeThe code is as follows:

 
function isint1(str) 
{ 
var result=(/^[0-9]$|^([1-9])([0-9]){0,3}$|^10000$/); 
if(result==null) return false; 
return true; 
} 

//Match Tencent QQ number

Copy the codeThe code is as follows:

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

//Match ID card (15 or 18)

Copy the codeThe code is as follows:

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

//Check whether the text is empty

Copy the codeThe code is as follows:

 
function checknull(field,sval) 
{ 
if ( =="") 
{ 
alert("Please fill in" + sval + "!");
(); 
return false; 
} 
return true; 
} 

//Mask input characters

Copy the codeThe code is as follows:

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