webform checkbox value javascript

i have checkbox list control asp.net web form i am boldly populating an arraylist. javascript i wish means iterate by values list sole value comparison arrangement controls page.

my emanate values checkbox list arrangement adult 'on' instead tangible value set. i tangible values any checkbox?

thanks.

javascript:

checkboxs=document.getelementbyid(checkboxlist);
    var options=checkboxs.getelementsbytagname('input');       

    for(var i=0;i<options.length;i++)
    {            
        if(options[i].value=="other")
        {
            if(options[i].checked)
            {
                var  otherpub=document.getelementbyid('<%=alsotherpublicity.clientid%>');
                otherpub.style.display='block';

            }                
        } 

    }

edit: line i'm carrying problems if(options[i].value=="other") values arrangement adult firebug given 'on' rather values i set.

edit 2: html produces looks like:

<span id="ctl00_contentplaceholdermetadata_allocation1_alfpublicity" class="ucfieldcbl" onchange="alvalidate();" onclick="alpublicity('ctl00_contentplaceholdermetadata_allocation1_alfpublicity');">
  <input id="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_0" type="checkbox" name="ctl00$contentplaceholdermetadata$allocation1$alfpublicity$0"/>
  <label for="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_0">text1</label>
  <input id="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_1" type="checkbox" name="ctl00$contentplaceholdermetadata$allocation1$alfpublicity$1"/>
  <label for="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_1">text2</label>
  <input id="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_2" type="checkbox" name="ctl00$contentplaceholdermetadata$allocation1$alfpublicity$2"/>
  <label for="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_2">text3</label>
  <input id="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_3" type="checkbox" name="ctl00$contentplaceholdermetadata$allocation1$alfpublicity$3"/>
  <label for="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_3">text4</label>
  <input id="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_4" type="checkbox" name="ctl00$contentplaceholdermetadata$allocation1$alfpublicity$4"/>
  <label for="ctl00_contentplaceholdermetadata_allocation1_alfpublicity_4">text5</label>
</span>

it looks emanate stems miss value charge accessible asp.net checkbox control described . i'm now perplexing workaround job duty server side relapse calm checkbox controlling instead.