HTML Code that will provide Authentication to i site

I am trying to get some code that allows me to have a user Type in an Employer Number 54321009876512 and then the code would check to make sure the firts 7 Didget were 5432100 and that the number was 14 Charicters  long and the would forwared them to a web link

Example : Type in  543210098765412  Submit   www.google.com window would open.
LOGTECHSERVAsked:
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mukhtar2tCommented:
if substr($str,0,7) = '5432100' and length($str) == 14
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LOGTECHSERVAuthor Commented:
I Have no clue what that means im sorrry i am the farthest ting from a programer  im just looking for somethiing to cut and paste in to a html page.

Thanks
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mukhtar2tCommented:
you can not do this by html
HTML just display the text
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mukhtar2tCommented:
However you can use PHP
if(substr($str,0,7) = '5432100' ) and (length($str) == 14)
{
do whatever you want
}
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veiko_1001Commented:
Insert this Javascript code between you <head> tags:

<script type="text/javascript">
      function verifyCode() {
            var codeToCheck = document.myForm.myTextField.value;
            if(codeToCheck.length != 14 || codeToCheck.substr(0,7) != "5432100")
                  alert("Incorrect code");
            else
                  window.location = "http://www.google.com";
      }
</script>

And then the following form in your page:

      <form name="myForm">
            <input type="text" name="myTextField" value="54321009876512" /><br />
            <input type="button" name="myButton" value="Submit" onclick="javascript: verifyCode();" />
      </form>
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veiko_1001Commented:
Sorry remove the value="54321009876512" part from the text field, I was just using that to try it out. So the form should actually look like this:

      <form name="myForm">
            <input type="text" name="myTextField" /><br />
            <input type="button" name="myButton" value="Submit" onclick="javascript: verifyCode();" />
      </form>
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