How does javascript handle numbers transmitted via POST?

Forums: Javascript, Web Development, Post Method
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OK, this is for a puzzle/riddle site. You're supposed to figure out a string of numbers that solves an equation. The developer posted this hint:

Quote:

You need to know that javascript don't handles numbers the same if they got transmittet via post.

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@DrewDad,

Not sure what they mean by that, JavaScript doesn't have access to posted data without working around it. A POST goes to the server, which typically will then load a page. Unless the server-side code passes the number to the client the JavaScript shouldn't know anything at all about the post.

1 Reply

@Robert Gentel,

It's a webpage generated by php.

You enter numbers in text boxes, then click a submit button. It calls a javascript function, and runs a calculation

There isn't a way to solve it with integers 1-9, each integer entered once.

Here's the hint they gave:

Quote:

You need to know that javascript don't handles numbers the same if they got transmittet via post.

Here's the page source:

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

<title>LOST-Chall / Left Behind</title>

<script type="text/javascript">

function EnterCode() {

var number1=document.challenge.number1.value;

var number2=document.challenge.number2.value;

var number3=document.challenge.number3.value;

var number4=document.challenge.number4.value;

var number5=document.challenge.number5.value;

var number6=document.challenge.number6.value;

var number7=document.challenge.number7.value;

var number8=document.challenge.number8.value;

var number9=document.challenge.number9.value;



var redcable=Math.sin(number1)+(number2*2);

if (redcable==15.243197504692072){

 var bluecable=redcable+Math.pow(number3,number4);

 if(bluecable==23.24319750469207){

  var greencable=bluecable+redcable-number5+number6;

  if(greencable==29.486395009384141){

   var blackcable=greencable+number7+number8-number9;

   if(blackcable==22.486395009384143){

    alert("Nice job!");

   }

  }

 }

}

}

</script>



<link href="mm_travel2.css" rel="stylesheet" type="text/css" />

</head>

<body>

<table width="521" height="231" border="0" align="center">

  <tr bgcolor="#000000">

  	<form name="challenge" method="post" action="left-behind.php">



    <td width="539" height="227" valign="top" bgcolor="#000000"><h1 class="Stil1">Challenge S3E15</h1>

      <h1 class="Stil1">Left Behind </h1>

      <p class="Stil1">Enter the code. It's coming... </p>

      <p class="Stil1">Put in the numbers in order you need to push them. Use the number 1-9.</p>

      <p class="Stil1"><img src="pics/CodeJuliet.jpg" width="338" height="212" /></p>

      <p class="Stil2">Solution:</p>



      <p>

        <input type="text" size="3" name="number1" class="solution" />

        <input type="text" size="3" name="number2" class="solution" />

        <input type="text" size="3" name="number3" class="solution" />

      </p>

      <p>

        <input type="text" size="3" name="number4" class="solution" />

        <input type="text" size="3" name="number5" class="solution" />

        <input type="text" size="3" name="number6" class="solution" />



      </p>

      <p>

        <input type="text" size="3" name="number7" class="solution" />

        <input type="text" size="3" name="number8" class="solution" />

        <input type="text" size="3" name="number9" class="solution" />

      </p>

      <p>

        <input type="submit" name="submit" value="submit" onClick="EnterCode()" class="button" />

              </p>



    </form>

  </tr>

</table>

<p align="center" class="Stil1"><a href="index.php"><img src="pics/bbbg.jpg" border="0" /></a></p>

</body>

</html>

1 Reply

@DrewDad,

Have you tried disabling JavaScript and submitting? I found the site, and loaded up the missing css and images from the code you posted, but when I try it myself it just goes to the home page (not sure if I need to be logged in).

1 Reply

@Robert Gentel,

Problem is that the math doesn't add up....

Maybe I'm just missing something.

Thanks for your help.

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How does javascript handle numbers transmitted via POST?

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