Array of listbox

[rajiv07]

Hi I am using an array of listboxes .here i want to get the index of the listbox when it get changed.I have spent 1 Hour for this problem but i could not sort this problem.

Please Help me on this.

Thanks
Rajiv

[gits]

hi ...

please post the code you have so far ...

kind regards

[rajiv07]

hi ...

please post the code you have so far ...

kind regards

Thanks gits

var position;
for(i=0;i<=document.form1.ref_type.length;i++){
if(document.form1.ref_type[i].change==true){
position=i; }
 }
 

But this is not working.

Thanks

Rajiv

[gits]

that will not work that way. how do you construct the array of your listboxes and whatfor do you need the index to be retrieved? lets sort out this together ... the idea would be:

1. don't use an array but an object
2. onchange of the select-node we retrieve its position in the list

kind regards

[rajiv07]

that will not work that way. how do you construct the array of your listboxes and whatfor do you need the index to be retrieved? lets sort out this together ... the idea would be:

1. don't use an array but an object
2. onchange of the select-node we retrieve its position in the list

kind regards

Please could you post any sample code or sites to refer form this.

Thanks

[gits]

ok assuming we use the following code:

var list   = document.getElementsByTagName('select');
var lookup = {};
 
for (var i = 0, n; n = list[i]; i++) {
    lookup[n.name] = i;
}
 

lookup now looks like this pseudocode:

{ select_name: select_index_in_list }

now you could use a function like this in the onchange of the select-node:

function get_idx(node) {
    return lookup[node.name];
}

[HTML]<select name="my_name" onchange="get_idx(this);">[/HTML]
where the function returns you the index in list

kind regards