Variable manipulation question

[billy83]

Hello. I want to do the following. I want to write this
if (document.a0.box.checked==true)
but instead of writing .a0. i want to pass the value of a variable.
For example to have sth like temp='a0'; But if i write this
if (document.temp.box.checked==true), it doesn't work. Any suggestion?

 

[trollacious]

You gotta show more of your code so we can get a better understanding of what you have so far. Copy and paste rather than writing it in new so we get an exact copy of what the browser sees.

Lee

 

[billy83]

Well my code is the following. I have cut some of it. I just want to replace all this code by writing a loop. The only thing that changes is one variable(a0-a35, yes i have written it 35 times!).


var id=new Array();

function find(){
j=0;
count=0;

if (document.a0.box.checked==true){
id[j]=document.a0.box.value;j++;}count++;
if (document.a1.box.checked==true){
id[j]=document.a1.box.value;j++;}count++;
if (document.a2.box.checked==true){
id[j]=document.a2.box.value;j++;}count++;
if (document.a3.box.checked==true){
id[j]=document.a3.box.value;j++;}count++;

}

 

[cLFlaVA]

.box? what is that? if the elements have an ID of "a1", "a2", etc., try something like:

for ( var i = 0; i < 35; i++ ) {
    if ( document.getElementById("a" + i).checked )
        id[j] = document.getElementById("a" + i).value;
}

*cLFlaVA
----------------------------
[tt]"quote goes here"[/tt]
[URL unfurl="true"]http://www.coryarthus.com/[/url]

 

[kaht]

assuming a0 is the formname, and box is the name of one of the form elements, then you really should be using the form and elements collections:

if(document.forms["a0"].elements["box"].checked)

and as far as using them in variable form:

var formName = "a0";
var elementName = "box";
if (document.forms[formName].elements[elementName].checked)

-kaht

http://www.silkypups.com

[small](All puppies have now found loving homes, thanks for all who showed interest)[/small]

 

[trollacious]

You mean something like:

var id=new Array();

function find(){
var count=0, limit=35;

for (var j=0;j<=limit;j++)
  {
  if (document.forms['a' + j].box.checked==true)
    {
    id[j]=document.forms['a' + j].box.value;
    }
  count++;
  }

Lee

 

[trollacious]

Figures that you two would beat me to it. #

Lee