function searchanswer()
  {
     var choosesort;
     var keyword;     
     keyword=document.getElementById('txtquestion').value;
     
     if(document.getElementById('radaknow').checked)
     {
        choosesort = "know";
     }
     else if((document.getElementById('radarticle').checked))
     {
        choosesort = "article";
     }
     else if((document.getElementById('radenterprise').checked))
     {
        choosesort = "enterprise";
     }
     else
     {
        choosesort = "person";
     }
     
    if (keyword == "" && choosesort == "")
    {
        location.href="http://ask.tbshops.com/tbknow/solution_question.aspx";//搜索都为空时暂时先转到天霸知道的首页
    }
    else if (keyword != "" && choosesort == "")//用户输入的问题关键字不为空时转到天霸知道的已解决问题搜索列表页面
    {
        location.href='http://ask.tbshops.com/tbknow/solution_question.aspx?keyword=' + escape(keyword);
    }
    else if (choosesort == "person")//选择作者为搜索条件类别转到天霸知道会员搜索列表页面
    {
        location.href='http://ask.tbshops.com/tbknow/person_search.aspx?keyword=' + escape(keyword) + '&choosesort=' + choosesort;
    }
    else if (choosesort == "enterprise")//选择企业为搜索条件类别转到天霸知道企业搜索列表页面
    {
        location.href='http://ask.tbshops.com/tbknow/enterprise_search.aspx?keyword=' + escape(keyword) + '&choosesort=' + choosesort;
    }
    else if (choosesort == "article")//选择文章为搜索条件类别转到天霸知道文章搜索列表页面
    {
        location.href='http://ask.tbshops.com/tbknow/article_search.aspx?keyword=' + escape(keyword) + '&choosesort=' + choosesort;
    }
    else if (choosesort == "know")//选择已解决问题为搜索条件类别转到天霸知道已解决问题搜索列表页面
    {
       location.href='http://ask.tbshops.com/tbknow/solution_question.aspx?keyword=' + escape(keyword);
    }
  }