Question

How to create an array text box to lessen the codes

Asked by: lin100

How to create an array text box to lessen the codes
===========================================

I have a total of four IP addresses that may (optional not mandatory) to be filled in.
Each Ip address have four separate fields. This gives a total
of 16 fields. The code below showed that codes has to be
written for these individual fields.

1) Is there a way to declared in HTML that these fields are arrays
so that I could access them by subscript (ex: array[1] to array[16]) to lessen the codes ?

===========================================
[code]
<script LANGUAGE="Javascript">

</SCRIPT>

[/code]

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Asked On: 2003-09-29 at 08:43:13ID20751894
Tags: array
,; box
,; text
Topic: JavaScript
Participating Experts: 3
Points: 50
Comments: 10

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Answers

by: NushiPosted on 2003-09-29 at 08:45:58ID: 9452364

hi there.

you simply use the array syntax:

var myArray = new Array();

now u can add variables to the arry based on index or Name:
myArray[0]='a';
myArray["3"] = 'b';

alert(myArray[0]) == a
alert(myArray("3")) == b;

Nushi.\

by: VincentPugliaPosted on 2003-09-29 at 09:30:23ID: 9452641

Hi,

if you name the input fields the same, they automatically become an array

<html>
<head>
<script>

</script>
</head>
<body>
<form name="a">
<input type="text" name="ipAdd" value="1">
<input type="text" name="ipAdd" value="2">
<input type="text" name="ipAdd" value="3">
<input type="text" name="ipAdd" value="4">
<input type='button' value='click 2C vals' onclick='doit(this.form)'
</form>
</body>
</html>

Vinny

by: mark-bPosted on 2003-09-29 at 09:38:54ID: 9452687

You can manage them much easier without using arrays if you want (pass in option string to functions):

<script>
function check_for_all_0_and_all_255(fld) {
if ( !fld ) fld = '';
var ip1 = document.form1['ip1' + fld ];
var ip2 = document.form1['ip2' + fld ];
var ip3 = document.form1['ip3' + fld ];
var ip4 = document.form1['ip4' + fld ];

var ipTotal = parseInt(ip1.value) + parseInt(ip2.value) + parseInt(ip3.value) + parseInt(ip4.value);
if (ipTotal == 0 || ipTotal == 1020 ) {
alert ("The IP value cannot be " + ( ipTotal == 0 ? "0.0.0.0" : "255.255.255.255" ) );
ip1.value = "";
ip2.value = "";
ip3.value = "";
ip4.value = "";
return false;
}
}

function only_numbers() {
// something here
}

function check_for_over_255() {
// something here
}
</SCRIPT>

<body>

<form name='form1'>
<input type=text size=3 maxlength=3 name=ip1 onkeyup='only_numbers(ip1)' onblur='check_for_over_255(ip1); check_for_all_0_and_all_255()' value="1"> <b>.</b>
<input type=text size=3 maxlength=3 name=ip2 onkeyup='only_numbers(ip2)' onblur='check_for_over_255(ip2); check_for_all_0_and_all_255()' value="2"> <b>.</b>
<input type=text size=3 maxlength=3 name=ip3 onkeyup='only_numbers(ip3)' onblur='check_for_over_255(ip3); check_for_all_0_and_all_255()' value="3"> <b>.</b>
<input type=text size=3 maxlength=3 name=ip4 onkeyup='only_numbers(ip4)' onblur='check_for_over_255(ip4); check_for_all_0_and_all_255()' value="4">
<br>
<input type=text size=3 maxlength=3 name=ip1op1 onkeyup='only_numbers(ip1op1)' onblur='check_for_over_255(ip1op1); check_for_all_0_and_all_255("op1")' value="1"> <b>.</b>
<input type=text size=3 maxlength=3 name=ip2op1 onkeyup='only_numbers(ip2op1)' onblur='check_for_over_255(ip2op1); check_for_all_0_and_all_255("op1")' value="2"> <b>.</b>
<input type=text size=3 maxlength=3 name=ip3op1 onkeyup='only_numbers(ip3op1)' onblur='check_for_over_255(ip3op1); check_for_all_0_and_all_255("op1")' value="3"> <b>.</b>
<input type=text size=3 maxlength=3 name=ip4op1 onkeyup='only_numbers(ip4op1)' onblur='check_for_over_255(ip4op1); check_for_all_0_and_all_255("op1")' value="4">
</td>
</form>
</body>
</html>

by: VincentPugliaPosted on 2003-09-29 at 09:39:49ID: 9452696

Or, if you would like to put the values within an array and then
access the array associatively:

<html><head>
<script type="text/javascript" language="javascript">

</script>
</head>
<body>
<form name="a">
<input type="text" name="ipAdd" value="http://members.aol.com/grassblad">
<input type="text" name="ipAdd" value="grassblad@aol.com">
<input type="text" name="ipAdd" value="http://www.webxpertz.net/forums">
<input type="text" name="ipAdd" value="4addf">
<input type='button' value='click 2C vals' onclick='doit(this.form)'>
<input type='button' value='click 2C array' onclick='fillArr(this.form)'>

</form>
</body>
</html>

Vinny

by: VincentPugliaPosted on 2003-09-29 at 10:17:37ID: 9452947

Hi

One more way -- without changing the unique field names
var ipNames = new Array();
ipNames[0] = new Array();
ipNames[0][0] = 'ip1';
ipNames[0][1] = 'ip2';
ipNames[0][2] = 'ip3';
ipNames[0][3] = 'ip4';
ipNames[1] = new Array();
ipNames[1][0] = 'ip1opt';
ipNames[1][1] = 'ip2opt';
ipNames[1][2] = 'ip3opt';
ipNames[1][3] = 'ip4opt';
....etc...

function chk0N255(oForm, arrNdx)
{
var convertedIPs = new Array();

for (var i = 0; i < 4; i++)
convertedIPs[i] = parseInt(oForm[ipNames[arrNdx][i]].value)

the html:

<input type=text size=3 maxlength=3 name='ip1' onblur='chk0N255(this.form,0)' value="<?=$lv_ip01?>"> <b>.</b>

<input type=text size=3 maxlength=3 name='ip1opt' onblur=' chk0N255(this.form,1)' value="<?=$lv_ip04?>">

Vinny

by: lin100Posted on 2003-09-29 at 12:08:14ID: 9453824

Hello mark-b and VincentPuglia. I will split the points between the two of you. Good job.

To VincentPuglia. Before I close this question.
On the very first solution that you give me, I copied the text and create an HTML page.
When I clicked the button, 'click 2C vals' nothing is happen. There is no alert box or error message
at the bottom left hand corner.

The name of the form is <form name="a">. I did not change the name of the form. I only make one change
as shown below.

I had to change this part
FROM <input type='button' value='click 2C vals' onclick='doit(this.form)'
TO <input type='button' value='click 2C vals' onclick='doit(a)'

1) How come the parameter "this.form" does not work?
2) I notice that there time when I worked on Javascript using "this.form" does not work, I had
to specify the form name.
3) What is the different between using say document.form1 and form1 (assuming that the form name is form1).

by: VincentPugliaPosted on 2003-09-29 at 12:35:13ID: 9454031

Hi lin,

If you look real close :
<input type='button' value='click 2C vals' onclick='doit(this.form)'
I never closed the input tag -- typo -- "the best laid plans of mice & men"
<input type='button' value='click 2C vals' onclick='doit(this.form)'>

Your fix shouldn't have worked for 2 reasons: no closing bracket and non-DOM-like
variable -- 'a'
Let me guess -- you tested on IE (same as me) -- IE evidently is not only forgiving, but
capricious as well

this.form will always work -- if the html is correct -- that is,
1) there are form tags, and
2) the element doing the calling is part of the form.

so:
<form>
<input ....doSomething(this.form)>
</form>
<input ....doSomething2(this.form)>

in the above -- the first 'this.form' works; the second, does not

'this' always refers to whatever it is pointing at (usually the current 'container')
In the above case, the 'document' so
'this.form' really means 'document.formname'
and doSomething(this) would mean 'document.formname.fieldname'

document.form1 is proper DOM (document object model) syntax for the form object
IE might recognize "form1.field1.value" as meaning the value of field1 in form1, but
virtually none of the other browsers would.

form1, by itself, would simply be a string that could be used to access the form:
for (var i = 0; i < document.forms.length; i++)
if (document.forms[i].name == 'form1')
alert(i);
(which would tell what number form form1 is -- the first, second, etc -- in the document

or

alert (document.forms['form1'].length)

Vinny

by: lin100Posted on 2003-09-29 at 13:46:33ID: 9454566

Hello Vinny.

=======================================
You are right about the explanation.
I tested the code below (without the closing bracket)
<form name="a">
<input type='button' value='click 2C vals' onclick='doit(a)'

Here is the result

IE 6.0 it run
Netscape 7.1, it run

=======================================

I tested the code below (without the closing bracket)
<form name="a">
<input type="button" value="click 2C vals" onclick="doit(this.form)"

Here is the result

IE 6.0 it will not run
Netscape 7.1, it run. Netscape 7.1 automatically filled in the closing bracket (>)
when you go View --> Page Source. However, Netscape does not save it to a file. It just
added the closing bracket when you view it from Netscape.

=======================================

I tested the code below (with the closing bracket)
<form name="a">
<input type="button" value="click 2C vals" onclick="doit(this.form)">

Here is the result

IE 6.0 it run
Netscape 7.1, it run.

by: VincentPugliaPosted on 2003-09-29 at 14:09:11ID: 9454793

thank gawd I'm right about something :D
interesting that it ran in NN7 & not IE

Vinny

by: lin100Posted on 2003-09-29 at 14:19:04ID: 9454870

Even though it ran in Netscape 7.1, when the alert box comes up there is no sound, where as is IE 6.0, there is a system sound when the alert box pop up. I did check the preference in Netscape 7.1, and alert sound is enabled under Preferences --> Notifications
Check the box "Show an alert"
Check the box "Play a sound"

20120131-EE-VQP-002

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How to create an array text box to lessen the codes

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