<s:select>多选框

         贴出用<s:select>实现的多选框的添加，删除功能。如下js。
//添加
function addTo(srcList,destList)
{
        var len = destList.options.length;    
        for(var i = 0; i < srcList.options.length; i++)
        {
                if ((srcList.options[i] != null) && (srcList.options[i].selected))
                {
                       //Check if this value already exist in the destList or not
                        //if not then add it otherwise do not add it.
                        var found = false;
                        for(var count = 0; count < len; count++)
                        {
                                if (destList.options[count] != null)
                                {
                                        if (srcList.options[i].text == destList.options[count].text)
                                        {
                                                found = true;
                                                break;
                                      }
                                }
                        }
                        if (found != true)
                        { 
                                destList.options[len] = new Option(srcList.options[i].text);
                                destList.options[len].value = srcList.options[i].value;
                                len++;
                       }
                 }
           }
        
}

//remove item from destLis删除
function deleteFrom(destList)
{
        var len = destList.options.length;
        for(var m = (len-1); m >= 0; m--)
        {
                if ((destList.options[m] != null) && (destList.options[m].selected == true))
                 {
                       destList.options[m].text = "";
                       destList.options[m].value = "";
                       destList.options[m]=null;
                       len--;
                 }
        }
}

在用<s:select multiply="true"/>作为多选框时，也可以用<select multiply="multiply">来代替<s:select/>.