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Accessing all the text fields within a form as an array

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Aug 08.2006

I have a form (form1) that contains multiple text fields, all numeric. I have another text field in another form (call it form2) that needs to have the sum of every text field in form1. Form1 is generated dynamically based upon a set of values in a database, so there’s no way I can see to actually hardcode a form1.text1.value + form1.text2.value type-thing. Is there any way I can get all the text fields in form1 as an array that I can iteratively add up instead? Thanks

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JavaScript

7 Comments(s) ↴

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@pilauAug 08.2006 — Use getElementsByTagName('textarea') ?

EDIT: Sorry, I missunderstood you. If you're using text fields (i.e. input tags) just give them a className of some name, like class="fields" and then collect them all by getElementsByClass
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@dkitchauthorAug 08.2006 — Use getElementsByTagName('textarea') ?[/QUOTE]

Thank you for the quick response.
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@dkitchauthorAug 08.2006 — How do I do this for elements such as <input type='text' width=3 name='801'/> though? Wouldn't tag name be 'input'? If so, then how do I distinguish between this and the <input type='submit'>?
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@pilauAug 08.2006 — Yeah ok this is why I edited my first post here. Anyway, I came across this function:
[CODE]function getElementsByClass(node,searchClass,tag) {
var classElements = new Array();
var els = node.getElementsByTagName(tag);
var elsLen = els.length;
var pattern = new RegExp("b"+searchClass+"b");
for (i = 0, j = 0; i < elsLen; i++) {
if ( pattern.test(els[i].className) ) {
classElements[j] = els[i];
j++;
}
}
return classElements;
}[/CODE]

Can you guess what it does? ?
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@CharlesAug 08.2006 — function getTotal (formObject) {
var e, i = 0, n = 0
while (e = formObject.elements[i++]) {
if (e.type == 'text') n += Number (e.value) || 0
}
return n
}
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@dkitchauthorAug 08.2006 — Here's what I have:

The page: <i>
</i>&lt;html&gt;&lt;head&gt;
&lt;link rel='stylesheet' href='style.css' type='text/css'&gt;
&lt;meta http-equiv='Content-Type' content='text/html; charset=UTF-8'&gt;

&lt;script LANGUAGE='JavaScript' src='CustomPcts.js'&gt;&lt;/script&gt;&lt;/head&gt;&lt;body&gt;
&lt;form name=theform method=POST action='PctEntry?action=update&amp;pid=1383'&gt;
&lt;h3&gt;Enter Custom %s&lt;/h3&gt;
Total: &lt;input type=text readonly name='totalbox' width=8&gt;
&lt;table&gt;
&lt;tr class=ColorBShade2&gt;
&lt;td&gt;Project ID&lt;/td&gt;&lt;td&gt;1383&lt;/td&gt;&lt;/tr&gt;
&lt;tr class=ColorAShade7&gt;
&lt;td&gt;Sum of a1.&lt;/td&gt;&lt;td&gt;&lt;input type=text size=4 onChange='updateTotal();' name=801&gt;&lt;/td&gt;&lt;/tr&gt;

CustomPcts.js:
<i>
</i>&lt;script type="text/javascript"&gt;
function updateTotal(){
var total = getTotal(document.getElementsByName('theform')[0]);
document.getElementsById('totalbox')[0].value = total;
}
function getTotal (formObject) {
var e, i = 0, n = 0
while (e = formObject.elements[i++]) {
if (e.type == 'text') n += Number (e.value) || 0
}
return n
}
&lt;/script&gt;

What am I doing wrong?
[code]
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@dkitchauthorAug 08.2006 — nevermind, found it... getElementById, not getElementsById[0]

thank you all for your help
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