Basic ID Issue (not Being Recognised)

Oct 14, 2004

I have a <FORM> with several text based input controls in it, and for some reason, although I have assigned ID values to these control, when I attempt to run any JavaScript error checking on them I get JS Error messages for some reason.

To simplify where I have gone wrong, I have written a simple JS alert message as follows...

alert(document.getElementById['first_name'].value);

and the <FORM> control I have is...

<form name="paypal_send">
<input type="text" id="first_name" name="first_name2" value="hello" />
</form>

But for some reason I am getting this error message...

Error:'document.forms.paypal_send.getElementById.first_name' is null or not an object.

This is really pulling my hair out, as can be seen, the inout control has an ID??

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Not Recognised When Referred In Another JS Code?

Jul 14, 2009

I am using the below pre-built script for my mouseover images:

And it works on the page simply by adding the following attribute to the image tag, with the behind being the mouseover image's url. Yes, it works.

But i have an external JS file that writes functions to the page, attached to the page.

There are some switch cases (i can post them in their entirety if you want), but the main purpose is that it changes the html of the DIV with the ID "home".

Note that the image "button/l5b.jpg" shows. But the mouseover effect done with "class=domroll button/l5.jpg" does not.

At first i guessed it could be a file path problem with the image, but later i realise i don't even see the red X that indicates a broken image. So i am guessing that this JS file cannot read another JS file?

The hierarchy of the file is like this:

- index.html
- js/chrisdomroll.js (the mouseover class)
- js/writefunctions.js (the class i used to write my own functions)

It does not seem to work either when i pasted the whole chunk of javascript from writefunctions.js into index itself.

Also, while the div shows properly in other browsers, it does not show up at all in Safari.

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Aug 30, 2011

I seem to have come across a weird issue in internet explorer.I've been working on doing regular expressions for a register form, and I've checked it in Firefox, and Chrome and it seems to work for both of them but yet it doesn't work for Internext Explorer 6 - 8.The issue is that the drop down boxes (select fields) dont seem to be recognised for RegEx in I.E. this is causing an issue for me as I want it to work in ALL common web browers as well as keeping the whole form standard.

I've pasted a snippet of code below to show you what I've done.This one below is the original one which just checks if the field entry is blank

function check(theForm)
{
var checker;[code]...

If you have any Ideas about what I can do to make it work in I.E. I would be most greatful. Also if anyone knows how to do and RegEx on a checkbox that would help me quite a bit too.

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Apr 5, 2006

Ive got a really simple problem but I can't figure it out. I've got a
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"http://". When I add onload="document.bob.bobtext.focus()" it focuses
on the text box, but at the beginning. Is it possible to focus on the
text box, but at the end of "http://"? This seems like something easy
so I'm probably making some stupid mistake.

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Jul 20, 2005

Suppose I have a page, call in parent.html . Inside, there is an iframe,
call it child.html . I want it so that in response to a keyboard event
in either parent or child, child.html will respond in a particular way.

Do I need to use a different set of code for each html page, or can I
reuse the same code?

If the code is different, what are the fundamental differences in code?

How do I make one frame respond to events in a different frame as a
general rule?

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Basic Calculator

Dec 6, 2003

I know there is a million of them but here's a little calculator script I made just for kicks. Feedback is always appreciated, good or bad.

I think I did a pretty good job of mirroring the windows calculator functionality.

Basic keys are mapped (optionally) to the keyboard.


<html>
<head>
<title>Web Calculator</title>
<style type="text/css">
table
{
text-align:center;
background-color:#e5e5c5;
}

.button
{
width:55px;
font-weight:bold;
background-color:lightblue;
color:#333399;
}

.functbut
{
width:55px;
font-weight:bold;
background-color:lightblue;
color:red;
}

.back
{
width:115px;
font-weight:bold;
background-color:lightblue;
color:red;
}

.header
{
color:#333399;
}

#display
{
text-align:right;
}
</style>
<script type="text/javascript">
var find=document.getElementById;
var temp=0;
var total=0;
var which=0;
var m=0;

function Mplus()
{
m=parseFloat(find('display').value) + m;
find('memory1').value="M+*";
}

function Mclear()
{
m=0;
find('memory1').value="M+";
}

function Mrecall()
{
find('display').value=m;
}

function Mreplace()
{
m=find('display').value;
}

function showMe(num)
{
if(temp==0)
{
find('display').value=num;
temp=1;
}
else
{
find('display').value+=num;
}
}

function calcEm(num)
{
str=parseFloat(find('display').value);
if(which==0)
{
total=find('display').value;
temp=0;
which=num;
}
else if(which==1)
{
find('display').value=parseFloat(total)+ str;
total=find('display').value;
which=num;
temp=0;
}
else if(which==2)
{
find('display').value=parseFloat(total) * str;
total=find('display').value;
which=num;
temp=0;
}
else if(which==3)
{
find('display').value=parseFloat(total) / str;
total=find('display').value;
which=num;
temp=0;
}
else if(which==4)
{
find('display').value=parseFloat(total) - str;
total=find('display').value;
which=num;
temp=0;
}

}

function clearAll()
{
find('display').value=0;
which=0;
temp=0;
total=0;
}

function clearDisplay()
{
find('display').value="0"
temp=0;
}

function fractIt()
{
find('display').value=(1) / str;
}

function getPerc()
{
var d=find('display').value=str / 100;
calcEm(0);
}

function backSpace()
{
find('display').value=find('display').value.substring("0",find('display').value.length-1);
}

function getRoot()
{
find('display').value=Math.sqrt(find('display').value);
}

function invertIt()
{
var w=find('display').value.indexOf("-");
if(w==-1)
{
find('display').value="-" + find('display').value
}
else
{
find('display').value=find('display').value.substring("1",find('display').value.length);
}
}



function keyHandler()
{
keys=new Array();
keys[97]=("1");
keys[98]=("2");
keys[99]=("3");
keys[100]=("4");
keys[101]=("5");
keys[102]=("6");
keys[103]=("7");
keys[104]=("8");
keys[105]=("9");
keys[96]=("0");
keys[13]=("equal");
keys[107]=("plus");
keys[110]=("dot");
keys[109]=("minus");
keys[106]=("times");
keys[111]=("divide");
keys[110]=("dot");
keys[8]=("back");
keys[27]=("clear");

kc=window.event.keyCode;

if(keys[kc]!=undefined)
{
cColor('#333399');
setTimeout('cColor("lightblue")',100);
find(keys[kc]).click();
}
return false;
}
function cColor(bcolor)
{
find(keys[kc]).style.background=bcolor;
}

function keyOnOff()
{
var b=find('keychoice').checked
if(b==true)
{
document.onkeydown=keyHandler;
}
else
{
document.onkeydown="";
}
}
function checkHandler()
{
var e=find('keychoice').checked
if(e==false)
{
e=true;
}
else
{
e=false;
}
keyOnOff();
}

</script>
</head>
<body>
<table cellspacing="0" border="1">
<thead>
<th colspan="6" class="header">Web Calculator</th>
</thead>
<tr>
<td colspan="6"><input type="text" size="43" id="display" value="0."></td>
</tr>
<tr>
<td colspan="2"><input type="button" value="Backspace" id="back" class="back" onclick="backSpace()"></td>
<td colspan="2"><input type="button" id="ce" value="CE" class="back" onclick="clearDisplay()"></td>
<td colspan="2"><input type="button" id="clear" value="C" class="back" onclick="clearAll()"></td>
</tr>
<tr>
<td><input type="button" class="functbut" value="MC" onclick="Mclear();"></td>
<td><input type="button" class="button" id="7" value="7" onclick="showMe(&#397;')"></td>
<td><input type="button" class="button" id="8" value="8" onclick="showMe(&#398;')"></td>
<td><input type="button" class="button" id="9" value="9" onclick="showMe(&#399;')"></td>
<td><input type="button" class="functbut" id="divide" value="/" onclick="calcEm(3)"></td>
<td><input type="button" class="button" id="sqrt" value="sqrt" onclick="getRoot();"></td>
</tr>
<tr>
<td><input type="button" class="functbut" value="MR" onclick="Mrecall();"></td>
<td><input type="button" class="button" id="4" value="4" onclick="showMe(&#394;')"></td>
<td><input type="button" class="button" id="5" value="5" onclick="showMe(&#395;')"></td>
<td><input type="button" class="button" id="6" value="6" onclick="showMe(&#396;')"></td>
<td><input type="button" class="functbut" id="times" value="*" onclick="calcEm(2)"></td>
<td><input type="button" class="button" id="perc" value="%" onclick="getPerc()"></td>
</tr>
<tr>
<td><input type="button" class="functbut" value="MS" onclick="Mreplace();"></td>
<td><input type="button" class="button" id="1" value="1" onclick="showMe(&#391;')"></td>
<td><input type="button" class="button" id="2" value="2" onclick="showMe(&#392;')"></td>
<td><input type="button" class="button" id="3" value="3" onclick="showMe(&#393;')"></td>
<td><input type="button" class="functbut" id="minus" value="-" onclick="calcEm(4)"></td>
<td><input type="button" class="button" id="x" value="1/x" onclick="fractIt()"></td>
</tr>
<tr>
<td><input type="button" class="functbut" value="M+" id="memory1" onclick="Mplus();"></td>
<td><input type="button" class="button" id="0" value="0" onclick="showMe(&#390;')"></td>
<td><input type="button" class="button" id="flop" value="+/-" onclick="invertIt()"></td>
<td><input type="button" class="button" id="dot" value="." onclick="showMe(this.value)"></td>
<td><input type="button" class="functbut" id="plus" value="+" onclick="calcEm(1)"></td>
<td><input type="button" class="functbut" id="equal" value="=" onclick="calcEm(0)"></td>
</tr>
<tr>
<td colspan="6" class="header">Num Pad On:<input type="checkbox"
id="keychoice" onclick="checkHandler();keyOnOff();"></td>
</tr>
</table>

</body>
</html>

Happy Calculating...

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im need to create s simple CMS/WYSIWYG, but im not a pro on js. I found one on a website, but i dont want to resort to stealing codes.

basically, theres a textarea, where you put in text, and a button for bold, italics and underline, etc. if i highlight something on the textarea and hit the bold button, the text automatically gets surrounded by the <b></b> tags, or or whatevers convinient. when i look at the inline js code from the button, it calls a function, but id rather simplify the code, it should be something like onclick=insertstyle("b","textarea_name");

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I have the source code to an old BASIC program that a friend of mine
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Any suggestions that might get me off to a good start here? I can
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After any text input on a form you simply add a...

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You must give the input an id as well as a name. They don't have to be the same thing, but its recommended.

NS broke when I was cleaning up the code. Searching for the error.

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Code:

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I feel that this must be possible within a minimal client (without a JVM)
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Would one of you more experienced JavaScript people please point me in the
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So my proposed solution to make the pages shorter would be to have one line
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See below:

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Sorry I couldn't find appropriate group for
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In the O'Reilly SVG book, in chapter 11
Animating and Scripting SVG. It mentions
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var obj = svgDocument.getElementById("idName");

I got error message said these are no a function
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When I used SVGView plug-in (made by Adobe) for IE .

I typed:

var svgObject = evt.target;
var svgDoc = svgObject.getOwnerDocument();
var svgElement = svgDoc.getElementById(idName);
var svgStyle = svgElement.getStyle();
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These lines are working fine for SVGViwe Plug-in by
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They complained that getOwnerDocument is not a function.
I tried to change getSVGDocument but no luck.

Is that O'Reilly book too old? Its first editoin is 2002.

How can I make getElementById() working in Firefox and Batik?
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[Code]...

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