menuItem = 
[
["0個","1個追加","2個追加","3個追加","4個追加","5個追加"],
["0個","1個追加","2個追加","3個追加","4個追加","5個追加"],
["0個","1個追加","2個追加","3個追加","4個追加","5個追加"],
["0個","1個追加","2個追加","3個追加","4個追加","5個追加"],
];


itemNum = 6; //　項目数 


function setMenuItem(n) 
  { 
  
  for (i=0; i<itemNum; i++)
          {
           document.mail_form.goods_other1.options[i] = new Option(menuItem[n][i],menuItem[n][i]);
           document.mail_form.goods_other2.options[i] = new Option(menuItem[n][i],menuItem[n][i]);
           document.mail_form.goods_other3.options[i] = new Option(menuItem[n][i],menuItem[n][i]);
          } 

  
          document.mail_form.goods_other1.style.visibility = "visible"; 

          document.mail_form.goods_other2.style.visibility = "visible"; 

          document.mail_form.goods_other3.style.visibility = "visible";   

          document.mail_form.goods6.style.visibility = "visible";
          

  if (document.mail_form.goods1.value == 0) {
          document.mail_form.goods_other1.style.visibility = "hidden";

          document.mail_form.goods_other2.style.visibility = "hidden";

          document.mail_form.goods_other3.style.visibility = "hidden";

          document.mail_form.goods6.style.visibility = "hidden";
          }

  }