选择一个下拉列表的值改变另一个下拉列表的值

//改变贴脸型号,相应改变贴脸宽度
  function check_tlkd(i){
  
   //获得id为sel_tlxh下拉列表的值
    var tlxh = document.getElementById("sel_tlxh"+i).options[window.document.getElementById("sel_tlxh"+i).selectedIndex].text;
    document.getElementById("sel_tlkd"+i).options.length = 0;
     
   //获得id为sel_tlkd的下拉列表
    var objSelect = document.getElementById("sel_tlkd"+i);

   //当tlxh为1#时,sel_tlkd里面的值为60
    if(tlxh == "1#"){
      var objOption = new Option("60","298");
      objSelect.add(objOption, 0);
    }

    //当tlxh为1#时,sel_tlkd里面的值为80
    else if(tlxh == "2#"){
      var objOption = new Option("80","298");
      objSelect.add(objOption, 0);
    }

    //显示其他的值
    else{
      var objOption = new Option("选择","0");
      objSelect.add(objOption, -1);
      var objOption = new Option("60","298");
      objSelect.add(objOption, -1);
      var objOption = new Option("80","299");
      objSelect.add(objOption, -1);
      var objOption = new Option("其他","999");
      objSelect.add(objOption, -1);
    }
  }







紫色头发:http://zisetoufa.iteye.com/