Both horizontal and vertical single grid

Challenge :

There are a single grid question . Respondents should prioritize statements (sub questions) .

Example :

I have a list of trade-mark and want the user to prioritize those list :

Dell

Apple

IBM

FPT Elead

Solution :

Use single grid question (statements as subquestion and ranks as answer option )

Code

The script makes a single grid question function as a single grid both horizontally and vertically.

option.prototype.getHTML = function(ltype)
{
   var stmp = "";
   if (this.visible)
   {
      switch (ltype)
      {
         case 2:
            stmp += "<input type=\"radio\" ";
            stmp += "name=\"" + this.label + "\" ";
            stmp += "value=\"" + this.value + "\" ";
            if (this.checked)
               stmp += "checked ";
            if (this.disabled)
               stmp += "disabled ";
            stmp += "onclick=\"myoptclick('" + this.label + "'," + this.index + ",false);\">";
            return "<td valign=\"center\" align=\"" + this.align + "\">" + stmp + "</td>"; ;
            break;
      }
   }
}
quest.next = nextTest;
function nextTest()
{
   // initialise check array
   var arrIndexUsed = new Array();
   for (i = 0; i < quest.questions[0].options.length; i++)
      arrIndexUsed[i] = false;
   // loop through options and check for double used options
   for (i = 0; i < quest.questions.length; i++)
   {
      for (j = 0; j < quest.questions[i].options.length; j++)
      {
         if (quest.questions[i].options[j].checked)
            arrIndexUsed[j] = true;
      }
   }
   // loop through possible answer options and check that all are used
   for (i = 0; i < arrIndexUsed.length; i++)
   {
      if (!arrIndexUsed[i])
      {
         alert('All options must used');
         return false;
      }
   }
   buttonsStatus(true);
   document["query"]["dir"].value = "next";
   return true;
}
function myoptclick(slbl, lidx, blnk)
{
   optclick(slbl, lidx, blnk);
   for (i = 0; i < quest.questions.length; i++)
   {
      if (quest.questions[i].label != slbl)
      {
         quest.questions[i].options[lidx].checked = false;
         o1 = document["query"][quest.questions[i].label];
         cb = o1;
         cb[lidx].checked = false;
      }
      else
      {
         for (j = 0; j < quest.questions[i].options.length; j++)
            quest.questions[i].options[j].checked = false;
         quest.questions[i].options[lidx].checked = true;
         o1 = document["query"][quest.questions[i].label];
         cb = o1;
         cb[lidx].checked = true;
      }
   }
}