Get value of items from list using javascript

Question

I have this code :

<script>
  function getgroup(){

        var i=0;
        var total=document.getElementById("selectedOptions").length;

    while (i<total)
  {
    var group=document.getElementById("selectedOptions").value;
    var group2=group.substring(2);

    alert(group2);
     i++;
}
}
</Script>

I want to loop inside the list and get the value of each item in the list. By using this code I am getting only the value of the first item only.

Any help please?

There should only exist one object with a unique id. It's obvious there will be only one item. — Neil
– Neil, Commented Apr 10, 2012 at 13:16

Parv Sharma · Accepted Answer · 2012-04-10 13:16:32Z

2

i think u are using getElementById() method and by specification the ids of elements should be unique so the length will always be one. try adding a class and use getElementsByClass()

answered Apr 10, 2012 at 13:16

Parv Sharma

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2 Comments

Joel Lundberg Over a year ago

Given that the element with id "selectedOptions" is a select, length will contain the number of options in that select.

Parv Sharma Over a year ago

but here nowhere it is mentioned.. i know this.. anyways thankx

Joel Lundberg · Accepted Answer · 2012-04-10 13:20:33Z

1

You are assigning the value of the select element to the group variable. You need to loop through the options instead:

group = document.getElementById("selectedOptions").options[i].value;

answered Apr 10, 2012 at 13:20

Joel Lundberg

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6 Comments

alkhader Over a year ago

Just a small thing, I want to sum() the group value, I did var group3=group3+group2; but it is not calculating

Joel Lundberg Over a year ago

What is the result you're getting? You might have to use parseInt on the variables to be able to sum them up.

alkhader Over a year ago

var group2=parseInt(group.substring(2)); I got NaN as a result

Joel Lundberg Over a year ago

What kind of values do you have on your options? They have to be numbers of some kind if you want to add them together, which they are not if you get a NaN result.

alkhader Over a year ago

Example1: G.132, I am getting the number (132) - Example2: G.125 and so on

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