JS judge name ID card mobile phone number Regular Expression

Function checkform1 ()
{

If (form1.username. value = "")
{
Alert ("name cannot be blank! ");
Return false;
}
If (! Iscardname (form1.username. Value ))
{
Alert ("name error! ");
Return false;
}
If (form1.usercode. value = "")
{
Alert ("ID card number cannot be blank! ");
Return false;
}
If (! Isidcard (form1.usercode. Value ))
{
Alert ("Incorrect ID card number! ");
Return false;
}
If (form1.msisdn. value = "")
{
Alert ("the mobile phone number cannot be blank! ");
Return false;
}



If (! Ismobile (form1.msisdn. Value ))
{
Alert ("mobile phone number error! ");
Return false;
}
VaR promit = Document. getelementbyid ("fillinfoform_promit ");
If (promit. Checked! = True ){
Alert ("You have not yet agreed to the terms of service ");
Return false;
}
Return true;
}
// Check Chinese Characters
Function ischinese (s)
{
VaR patrn =/^ \ s * [\ u4e00-\ u9fa5] {1, 15} \ s * $ /;
If (! Patrn.exe C (s ))
{
Return false;
}
Return true;
}

// Number
Function isnumber (s)
{
VaR patrn =/^ \ s * \ D + \ s * $ /;
// Var patrn1 =/^ \ s * \ D {16} [\ dxx] {2} \ s * $ /;
If (! Patrn.exe C (s ))
{
Return false;
}
Return true;
}
// Verify the mobile phone number: it must start with a number
Function ismobile (s)
{
VaR patrn =/^ \ s * (15 \ D {9} | 13 [0-9] \ D {8}) \ s * $ /;
If (! Patrn.exe C (s ))
{
Return false;
}
Return true;
}

// Check your ID card
Function isidcard (s)
{
VaR patrn =/^ \ s * \ D {15} \ s * $ /;
VaR patrn1 =/^ \ s * \ D {16} [\ dxx] {2} \ s * $ /;
If (! Patrn.exe C (s )&&! Patrn1.exec (s ))
{
Return false;
}
Return true;
}

// Check name: The name is a string of 2 to 15 characters.
Function iscardname (s)
{
VaR patrn =/^ \ s * [\ u4e00-\ u9fa5] {1,} [\ u4e00-\ u9fa5. ·] {0, 15} [\ u4e00-\ u9fa5] {1,} \ s * $ /;

If (! Patrn.exe C (s ))
{
Return false;
}
Return true;
}