javascript average from from values in radiobuttons?

Hi all,

can you please help me with these part of my code, I want to calculate average grade from each module and
not sure if need to label each element there, or is there any easier option to do that?

appreciate your help

see my code here:

        <p id="one" class="hiddenDiv" form name="semester1" action"#"> 
        whats your scores in these modules?</br>
        Web developement:
        <label> <input type = "radio"  name = "web"   
                       value = "fail"  /> 0-39 </label> 
        <label> <input type = "radio"  name = "web"   
                       value = "59" /> 40-59 </label> 
        <label> <input type = "radio"  name = "web"   
                       value = "75" /> 60-75 </label> 
        <label> <input type = "radio"  name = "web"   
                       value = "89" /> 76-89 </label>
        <label> <input type = "radio"  name = "web"   
                       value = "100" /> 90-100 </label>
       </br></br>
     Programming  : 
     <label> <input type = "radio"  name = "pr"   
                       value = "fail"  /> 0-39 </label> 
        <label> <input type = "radio"  name = "pr"   
                       value = "59" /> 40-59 </label> 
        <label> <input type = "radio"  name = "pr"   
                       value = "75" /> 60-75 </label> 
        <label> <input type = "radio"  name = "pr"   
                       value = "89" /> 76-89 </label>
        <label> <input type = "radio"  name = "pr"   
                       value = "100" /> 90-100 </label>
      </br></br>
      Interactive case study: 
      <label>A</label> <input type = "radio"  name = "ics"   
                       value = "fail" /> 0-39 > 
        <label>B</label> <input type = "radio"  name = "ics"   
                       value = "59" /> 40-59 </label> 
        <label> <input type = "radio"  name = "ics"   
                       value = "75" /> 60-75 </label> 
        <label> <input type = "radio"  name = "ics"   
                       value = "89" /> 76-89 </label>
        <label> <input type = "radio"  name = "ics"   
                       value = "100" /> 90-100 </label>    </br>
        <input type = "button"  name = "submit"   
                       onclick=""CALCULATE? ? ? " " value="submit" name="submit" type="submit" />