Common Regular Expressions in JavaScript (ID card number)

< Script Language = "JavaScript" >
Function Checkidcard (STR)
{
VaR Isidcard1 =   New Object ();
VaR Isidcard2 =   New Object ();

// ID card Regular Expression (15 digits)
Isidcard1 =/^ [ 1 - 9 ] \ D {7} (( 0 \ D) | ( 1 [ 0 - 2 ]) ([ 0 | 1 | 2 ] \ D) | 3 [ 0 - 1 ]) \ D {3} $ / ;

// ID card Regular Expression (18 digits)

Isidcard2 =/^ [ 1 - 9 ] \ D {5} [ 1 - 9 ] \ D {3} (( 0 \ D) | ( 1 [ 0 - 2 ]) ([ 0 | 1 | 2 ] \ D) | 3 [ 0 - 1 ]) (\ D {4}) | \ D {3} [A-Z]) $ / ;

// Verify your ID card. If it is correct, submit it to the reg. ASP page.
If (Isidcard1.test (STR) | Isidcard2.test (STR ))
{
Document. Forms [ " Form1 " ]. Action =   " ./Reg. asp " ;
Document. Forms [ 0 ]. Submit ();
Return   True ;
}
Alert ( " Enter the correct ID card! " );
Return   False ;

}
</ Script >
< Form Name = "Form1" Method = Post Onsubmit = "Return checkidcard (this. user_iden.value )" >
< Input Name = "User_iden" ID = "User_iden" Size = "18" >
< Input Type = "Submit" Name = "Testcall" Value = "Verify ID card number" >
</ Form >