I want to be able to give strict access to specific users to my web page, not BY IP; but through Javascript and HTML. 

How easy will it be to get the security string?

```
function fc4me(srvstr) {

   if(!document.pleazfc4me.email.value || !document.pleazfc4me.securitystring.value) {
      alert("Please fill in all the required fields!");
      return false;
   }
   if(document.pleazfc4me.securitystring.value != hexMD5("\x73\x73"+srvstr)) {
      alert("Registration Authorization String not accepted! Try Harder! ");
      return false;
    } else {
      document.pleazfc4me.submit();
    }

}

```

and the other page?

```
Security String<font color="orange">*</font>:
<input type="text" name="securitystring" size="35">
<input onClick="var srvstr='foo';fc4me(srvstr);document.pleazfc4me.securitystring.value='';return false;" name="submit" type="image" src="images/button-submit.png" />

```