JavaScript easy help needed

**pi0tr3k** · 4th Mar 2012, 10:43 AM

Hey guys,

I need some JS help, I dunno why it doesn't work tbh :/
It's something simple..

Here is the code

PHP Code:


<script language="javascript" type="text/javascript" >     
<!-- 
    function optellen(a,b) 
    {
            var res = parseInt(a) + parseInt(b);
            return res;
    }
    var getal1 = prompt("Type eerste getal in");
    var getal2 = prompt("Type tweede getal in");
    var uitkomst = optellen(getal1, getal2);
    document.write(getal1 + " plus " + getal2 " = " + uitkomst);
-->
</script>

And the full header:

PHP Code:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
<link rel="SHORTCUT ICON" href="sun.png" type="image/x-icon" />
    <title> TROLOLOLOLO </title>
<link href="style.css" rel="stylesheet" type="text/css" /> 

<!-- JAVASCRIPT hoofdstuk 4--> 
<script language="javascript" type="text/javascript" src="code.js"></script>
<script language="javascript" type="text/javascript" >     
<!-- 
    function optellen(a,b) 
    {
            var res = parseInt(a) + parseInt(b);
            return res;
    }
    var getal1 = prompt("Type eerste getal in");
    var getal2 = prompt("Type tweede getal in");
    var uitkomst = optellen(getal1, getal2);
    document.write(getal1 + " plus " + getal2 " = " + uitkomst);
-->
</script>
<!-- JAVASCRIPT --> 
</head>

I dunno where it went wrong

Any help appreciated

Cheers

pi0tr3k Reviewed by pi0tr3k on 4th Mar 2012. JavaScript easy help needed Hey guys, I need some JS help, I dunno why it doesn't work tbh :/ It's something simple.. Here is the code <script language="javascript" type="text/javascript" > <!-- function optellen(a,b) { Rating: 5

**Rox** · 4th Mar 2012, 10:46 AM

forgot to close the html tag?

**pi0tr3k** · 4th Mar 2012, 10:47 AM

No no mate, it's all OK

I only posted the <head> section here

Anyways, here is the whole page:

PHP Code:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
<link rel="SHORTCUT ICON" href="sun.png" type="image/x-icon" />
    <title> TROLOLOLOLO </title>
<link href="style.css" rel="stylesheet" type="text/css" /> 

<!-- JAVASCRIPT hoofdstuk 4--> 
<script language="javascript" type="text/javascript" src="code.js"></script>
<script language="javascript" type="text/javascript" >     
<!-- 
    function optellen(a,b) 
    {
            var res = parseInt(a) + parseInt(b);
            return res;
    }
    var getal1 = prompt("Type eerste getal in");
    var getal2 = prompt("Type tweede getal in");
    var uitkomst = optellen(getal1, getal2);
    document.write(getal1 + " plus " + getal2 " = " + uitkomst);
-->
</script>
<!-- JAVASCRIPT --> 
</head>
    
<body>

<center>
<a href="#down"><img src="down.png" /></a>
<a id="top"></a>
    <h1> MINGA </h1> 
        <img src="http://s1.eih.bz/images/photo1.gif" height="250px" width="250px" />
            <h2> Kleinere minga </h2>
            <h3> Blah </h3>
        <p><span>

        <font color="#FF0000"> ben ik rood? ow yeah</font>
<br>
        sdf:gnsdfklgnsdfgn lkdfsgl dsfngkl jdfnbknxcklvn wxcbknv ssdf:gnsdfklgnsdfgn lkdfsgl dsfngkl jdfnbknxcklvn wxcbknv s<br />
        sdf:gnsdfklgnsdfgn lkdfsgl dsfngkl jdfnbknxcklvn wxcbknv ssdf:gnsdfklgnsdfgn lkdfsgl dsfngkl jdfnbknxcklvn wxcbknv s<br /></span></p>
            <em>helllo em tag </em> 

mother of God<br />
<h1> <a href="lists.html" >Lists</a> </h1></br>
<h1> <a href="images.html" >Images</a> </h1></br>
<h1> <a href="tables.html" >Tables</a> </h1></br>
<a href="javascript:popup();">Alert popup JavaScript<a> <br /> 
<a href="javascript:pr0mpt();">Prompt popup JavaScript<a> <br /> 
<a href="javascript:pr0mpt2();">Prompt 2 popup JavaScript<a> <br /> 
<a href="javascript:optellen();">Prompt 2 getallen optellen<a> <br /> 
<a href="koppeling.html" > Ga terug zeimer </a><br />
<a href="koppeling.html" > Ga terug zeimer </a><br />
<a href="koppeling.html" > Ga terug zeimer </a><br />
<a href="koppeling.html" > Ga terug zeimer </a><br />
<a href="koppeling.html" > Ga terug zeimer </a><br />
<a href="koppeling.html" > Ga terug zeimer </a><br />
<a href="#top"><img src="up.png" /></a><br />
<a href="koppeling.html#down">Down</a>
<a id="down"></a>
</center>
</body>
</html>

**Halcyon** · 4th Mar 2012, 10:59 AM

You missed a plus sign before " = " in document.write

**pi0tr3k** · 4th Mar 2012, 11:09 AM

OMG

Thanks a lot

---------- Post added at 12:09 PM ---------- Previous post was at 12:02 PM ----------

One more little question, the script starts everytime I refresh the page.
I've also added a link to make it work, but it returns "NaN" when I click it:

<a href="javascript:optellen();">Prompt 2 getallen optellen</a> <br />

Ideas?

**Halcyon** · 4th Mar 2012, 11:14 AM

Lol, it says "null plus null = NaN" on top if I simply press OK

Do a proper checking of what input the user provides.

**t3od0r** · 4th Mar 2012, 11:15 AM

you must make a new function

Code:

function optellen(a,b) 
    {
            var res = parseInt(a) + parseInt(b);
            return res;
    }
function getoptellen() {
    var getal1 = prompt("Type eerste getal in");
    var getal2 = prompt("Type tweede getal in");
    var uitkomst = optellen(getal1, getal2);
    document.write(getal1 + " plus " + getal2 + " = " + uitkomst);
}

and call it

Code:

<a href="javascript:getoptellen();">Prompt 2 getallen optellen</a> <br />

**pi0tr3k** · 4th Mar 2012, 11:30 AM

Doesn't work t3o

**t3od0r** · 4th Mar 2012, 11:41 AM

i typed the function name wrong, check now

**filegrasper** · 4th Mar 2012, 11:43 AM

Whether you need help in this?

Or it is fixed? Let me know through pm!

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