Changing the innerText of a Html Label

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I have this very simple html/js code page :

JavaScript

<html>
<head>
   <title>Prova !1</title>
   <script>
      function test (a)
      {
         var v = 5;
         v = !1;		
         return v;
      }

   </script>
</head>
<body>

   <label id='2'> the answer is</label>
   <script>
      window.onload = function ()
      {
         var i ;
         i = document.getElementById('2');
         i[0].innerText += " "+test (0);
      }
   </script>
</body>
</html>

can anyone explain why, no matter what kind of object I use , be it a label or other, the document.getElementbyId('2') always returns null ?

Posted 13-May-14 4:56am

tiwal

Updated 13-May-14 5:07am

Nelek

v3

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Comments

Vi(ky 13-May-14 11:03am

Try this
i = document.getElementById('#2');

and why you pass parameter "a" in test(a), if are not using it

Keith Barrow 13-May-14 11:08am

Good answer. He might also need to add a name attribute to: <label id='2' name='2'> to support some versions of IE.

2 solutions

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2014-05-13T05:51:00

Solution 2

Peter is correct. You had problems with...

JavaScript

i[0].innerText += " " + test (0);

Which should be...

JavaScript

i.innerHTML += " " + test(0);

Demo

[Issue] Changing the innerText of a Html Label[^].

Note

As he says, think over the code first, because it is making no sense at all.

Posted 13-May-14 5:51am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Peter Leow 13-May-14 12:35pm

Thanks Tadit, sure 5ed!

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-May-14 12:37pm

Thanks Peter. :)

Peter Leow · Answer 2 · 2014-05-13T05:25:00

See my example and comments:

XML

<html>
<head>
   <title>Prova !1</title>
   <script>
      function test (a) // a has never used???
      {
         var v = 5;
         v = !1; // v is always false
         return v;  // returns false
      }

   </script>
</head>
<body>

   <label id='2'> the answer is</label>
   <script>
      window.onload = function ()
      {
         var i ;
         i = document.getElementById('2');
         //i[0].innerText += " "+test (0);
         i.innerHTML += " "+test(0); // the outcome is : the answer is false
      }
   </script>
</body>
</html>

What exactly do you want to do with this weird code?

Changing the innerText of a Html Label

2 solutions

Solution 2

Solution 1

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