列表内容的选择

  <HTML>

  <HEAD>

  <META http-equiv='Content-Type' content='text/html; charset=gb2312'>

  <TITLE>列表内容的选择</TITLE>

  </HEAD>

  <BODY >

  <SCRIPT LANGUAGE="JavaScript">

  <!-- Begin

  oldvalue = "";

  function passText(passedvalue) {

  if (passedvalue != "") {

  var totalvalue = passedvalue+"\n"+oldvalue;

  document.displayform.itemsbox.value = totalvalue;

  oldvalue = document.displayform.itemsbox.value;

  }

  }

  // End -->

  </script>

  <form name="selectform">

  <select name="dropdownbox" size=1>

  <option value="">请选择</option>

  <option value="第一项">第一项</option>

  <option value="第二项">第二项</option>

  <option value="第三项">第三项</option>

  <option value="第四项">第四项</option>

  <option value="第五项">第五项</option>

  <option value="第六项">第六项</option>

  </select>

  <input type=button value="添加到列表中" onClick="passText(this.form.dropdownbox.options[this.form.dropdownbox.selectedIndex].value);">

  </form>

  <form name="displayform" >

  <font face="Arial, Helvetica, Sans Serif" size="3"><b>你可以自己选择一下:</b></font><br>

  <textarea cols="30" rows="5" name="itemsbox" ></textarea>

  </BODY></HTML>