Strange hunting ~ POST cannot read data

Strange ~~~ POST cannot read the original data. the html code is like this, and I don't know where the error is... In insert_user.php, $ _ POST ["user_name"] cannot be used to read data... It will prompt me that the user name is blank... & Lt ;! DOCTYPE & nbsp; html & nbsp; strange ~~~ POST cannot read data
The original html code is like this, so I don't know what went wrong... In insert_user.php, $ _ POST ["user_name"] cannot be used to read data... It will prompt me that the user name is blank...






Script
Register
 
Function show_confirm ()
{
Var r = confirm ("Are you sure you want to submit your registration information ");
If (r = true ){
Alert ("you have registered successfully! ");
}
Else
{
// Alert ("You pressed Cancel! ");
}
}
Script


Body, td, th {

0;
Font-size: 20px;
Color: #673310;
Font-family: "";
}







User name: *
Enter the password: *
Enter a password consisting of 8 to 12 digits and letters
Enter the password again: *
Mail box:
Sex:

(This. value) ">
Select gender
Male
Female


Phone number:
I carefully read and accept the agreement.
* Required