Re: [LUG] Some help with javascript & firefox

[Kevin Lucas <kevin.lucas@xxxxxxxxxxxxxxxxxx>]

Tom Potts wrote:

On Tuesday 12 February 2008 10:59, Kevin Lucas wrote:
  

I am struggling with DOM and dynamic form inputs if anyone can find the
time to help.
    I have a web
form http://www.minionsbandb.co.uk/oldsplitaddtable.html which I need to
dynamically add rows to (three columns)  the at the end add one of the
columns.

    My problem is that I can't access the value on dynamic inputs in a
loop, I can't seem to get the syntax right if I have a form table input
value which is dynamically named as

newTxt2.name="vat_low"+rowNum  when I do a form eval

var  + rowNum.value);

I don't get the rowNum bit correct I have tried "" (){}[] in many
combinations but don't seem to be able to add together the two elements.
    In a DOM inspection the value for vat_low+rowNum starts at "vat_low3"

Any pointers or refs to _javascript_ are much appreciated
    

Theres been a bit flying about about this one so sorry if theres some 
repetition here.
1) first test simple cases:
newTxt2.name="vat_low";
...
var 
....
that probably wont work so when reading try using alerts to see if objects 
exist - try it on non existant/existant vars so you know how it reacts
alert(document.splitfm.vat_low);
var 

This will probably show you that document.splitfm.vat_low isnt resolving so 
try alert(document.forms[0]) and then alert(document.forms[0].vat_low)

eventually you may decide that 
alert("vat_low" + rowNum);//to check your string forms ok
var inputID="vat_low"+rowNum;//or whatever works
newTxt2.ID=inputID;


then use:
  document.getElementById(inputID); 
 to get at the inputs.

Tom te tom te tom
  

--
Regards: Kevin Lucas Post Master (Sub) Minions Shop & Tea Rooms Minions
Liskeard Cornwall PL14 5LE www.minionsbandb.co.uk
    

I have put a test  page on the site http://www.minionsbandb.co.uk/oldsplitaddtable.html
with three _javascript_ alerts with code like

alert("vat_low" + rowNum);
alert("vat_low" + rowNum.value);
<!-- alert (parseint(document.splitfm.vat_low.value)); -->
alert (newTxt2.ID)

the parseint bit halts the script.
can I use the ID ?
is there an ID .value?
If I do an alert for this it says Undefined?

So am I any closer or should I just go off and try with php and a temporary table in a DB?

--
Regards: Kevin Lucas Post Master (Sub) Minions Shop & Tea Rooms Minions Liskeard Cornwall PL14 5LE www.minionsbandb.co.uk

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