dkim18
asked on
Passing form and field names to a function
Hi Experts,
I am trying to add javascript functionality that limits number of char in textarea.
I found this:
I have many textarea and I want to modify javascript func so they can handle for all textarea.
Are there any way of passing form and field names to a function?
This didn't work for example:
thanks in advance
I am trying to add javascript functionality that limits number of char in textarea.
I found this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<style type="text/css"><!--
h1 { font-size: 140%; }
blockquote dl { margin: 0; padding: 0; }
--></style>
<script type="text/javascript"><!--
var limit = 8;
function checkTypeLength() {
if(document.f.box.value.length > limit) {
alert('Too much data!');
document.f.box.focus();
return false; }
else
return true;
}
function updateCharType() {
var old = document.f.counter.value;
document.f.counter.value=document.f.box.value.length;
if(document.f.counter.value > limit && old <= limit) {
alert('Too much data in the text box!');
if(document.styleSheets) {
document.f.counter.style.fontWeight = 'bold';
document.f.counter.style.color = '#ff0000'; } }
else if(document.f.counter.value <= limit && old > limit
&& document.styleSheets ) {
document.f.counter.style.fontWeight = 'normal';
document.f.counter.style.color = '#000000'; }
}
//--></script>
</HEAD>
<BODY>
<!--
document.f.box: document.stepTwo.deceasedRelativeCauseOfDeath.
f: stepTwo
box: deceasedRelativeCauseOfDeath
-->
<form action="http://www.cs.tut.fi/cgi-bin/run/~jkorpela/chkarea3.pl"
name="f" onsubmit="return checkTypeLength();">
<p>Please enter your message. The maximum number of characters
allowed is 8, counting each end of line as two characters.
If you fill out and submit this form repeatedly, you may
wish to
<input type="reset" value="clear"> it before starting
to type a new message.</p>
<textarea rows="4" cols="10" name="box"
onkeyup="updateCharType();"></textarea><br>
<noscript>
<p><small>(If you used a JavaScript enabled browser,
preferably supporting JavaScript version 1.2 or equivalent
(as supported e.g. by Internet Explorer 4,
Netscape Navigator 4, and Opera 5), you would have some help from
the browser in trying to remain within the limit.)</small>
</noscript>
<script type="text/javascript" language="JavaScript1.2"><!--
document.write('Characters typed: <input '+
'type="text" size="3" name="counter" value=""'+
'readonly onfocus="this.form.box.focus()"> (limit: '+
limit+')');
//--></script>
<p><input type="submit" value="Send">
</form>
</div>
</BODY>
</HTML>
I have many textarea and I want to modify javascript func so they can handle for all textarea.
Are there any way of passing form and field names to a function?
This didn't work for example:
function updateCharType(counter) {
var old = counter.value//<--didn't work!
}
<textarea rows="4" cols="10" name="box"
onkeyup="updateCharType(document.f.counter);">
thanks in advance
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