Hi,
I am currently using a Javascript function to dissallow the enter key
on my ASP.NET (2.0) web page, as follows:
function fnTrapKP(){
if (document.all)
{
if (event.keyCode == 13)
{
event.returnVal ue=false;
event.cancelBub ble = true;
}
}
}
I call this from the body of my master page as follows:
<body onkeypress="fnT rapKP();">
On one of my pages I have a multiline textbox. The function above now
stops a user from untering multiple lines of text in to this textbox.
Is there any way I can modify the function to only allow the enter key
to be allowed when my multiline textbox has the focus?
Thanks
Ian
4  6827 
ian said the following in news:comp.lang. javascript on 1/13/2006 at
11:35 AM: Hi,
I am currently using a Javascript function to dissallow the enter key
on my ASP.NET (2.0) web page, as follows:
Let's be frank, up front. You are not disallowing it, you are attempting
to disallow it.
function fnTrapKP(){
if (document.all)
{
if (event.keyCode == 13)
If you use feature detection (the if(document.all ) statement) then
feature detect for what you want to use.
if (event && event.keyCode && event.keyCode == 13)
{
event.returnVal ue=false;
event.cancelBub ble = true;
}
}
}
I call this from the body of my master page as follows:
<body onkeypress="fnT rapKP();">
On one of my pages I have a multiline textbox. The function above now
stops a user from untering multiple lines of text in to this textbox.
Is there any way I can modify the function to only allow the enter key
to be allowed when my multiline textbox has the focus?
var isBlurred = true;
function fnTrapKP(){
if (event && event.keyCode && (event.keyCode= =13) && isBlurred)
{return false;}
return true;
}
<body onkeypress="ret urn fnTrapKP();">
<textarea>Ent er not allowed</textarea>
<textarea onfocus="isBlur red=false;" onblur="isBlurr ed=true;">Enter
allowed</textarea>
--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/
Why not use an init function instead?
do something like:
function initKeyEvent()
{
var inputs = document.getEle mentsByTagName( "input");
var i = inputs.length;
while(i-->0)
{
if(inputs[i].type == "TEXT")
inputs[i].onkeypress = fnTrapKP;
}
}
that'll only pick up <input type="text" /> tags and not <textarea>
tags.
If you only want that textarea to be ignored, but pick up all the
others then try something like
<code>
// holds names or Ids or references to fields which are NOT to have the
event handler assigned.
// choose whichever identifier works best for you. I've stuck with name
'cos it's simple like me.
var ignoredFields = [];
function initKeyEvent()
{
var inputs = document.getEle mentsByTagName( "INPUT");
var textareas = document.getEle mentsByTagName( "TEXTAREA") ;
var i = inputs.length;
while(i-->0)
{
// note the triple ===; not a typo.
if(ignoredField s[inputs[i].name] || inputs[i].type!="text")
continue;
addKeyEvent(inp uts[i]);
}
i = textareas.lengt h;
while(i-->0)
{
if(ignoredField s[textareas[i].name)
continue;
addKeyEvent(tex tareas[i]);
}
}
function addKeyEvent(ele ment)
{
element.onkeypr ess = fnTrapKP;
}
function ignoreField(fie ldName)
{
ignoredFields[fieldName] = true;
}
</code>
now, at the bottom of the page with the multiline textbox use
<script>
ignoreField("my TextboxName");
</script>
That's all typed off the top of my head, so I apologise in advance for
fatal flaws, obvious typos, exploding monitors etc.
and the immediate fatal flaw is the "triple ===" comment where I was
using if(undefined=== ignoredFields[someKey])
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Hi,
I am currently using a Javascript function to dissallow the enter key
on my ASP.NET (2.0) web page, as follows:
function fnTrapKP(){
if (document.all)
{
if (event.keyCode == 13)
{
|
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