Simple variable/string question

[charliefortune]

I have three drop down menus that when changed call a simple js
function, passing a value i.e.

<SELECT name="Team" onChange="change('national');">

the function defined at the beginning is

function change(which) {
current = document.premForm.Team.selectedIndex;
document.images.premShirt.src = "assets/shirts/"
+document.premForm.Team[current].value + ".gif";
}

the var 'which' is being passed succesfully, but i can't work out how
to change

document.premForm.Team.selectedIndex;

into

document.whichForm.Team.selectedIndex;

depending on what value the function receives. My 3 forms are called
premForm,nationalForm and worldForm

 

[RobG]

charliefortune said on 04/04/2006 8:57 AM AEST:

I have three drop down menus that when changed call a simple js
function, passing a value i.e.

<SELECT name="Team" onChange="change('national');">

the function defined at the beginning is

function change(which) {
current = document.premForm.Team.selectedIndex;

pass a reference to the select to the function:

<SELECT name="Team" onChange="change(this, 'national');">

now the your function is:

function change(selectEl, which)
{
current = selectEl.selectedIndex;

document.images.premShirt.src = "assets/shirts/"
+ document.premForm.Team[current].value + ".gif";
}

the var 'which' is being passed succesfully, but i can't work out how
to change

document.premForm.Team.selectedIndex;

into

document.whichForm.Team.selectedIndex;

Presuming the name of the form is 'nationalForm', then:


document.forms[which + 'Form'].Team.selectedIndex;


Read the FAQ section on accessing properties:

 

[charliefortune]

Thank you, I have it working now, but without the parameter you added
to my function, the selectE1. I didn't quite get that bit, but I
obviously have some reading to so, so thanks again.