// JScript 文件
function Search()
{

 var txt_search=getInput("txt_search");
 if (txt_search.value.length<1)
    {
        alert('请输入搜索关键词!');
        return false;
    }
    return true;
}
function SearchNull()
{
  var txt_search=getInput("txt_search");
  txt_search.value='';
}
function SearchWord()
{
    var txt_search=getInput("txt_search");
    if (txt_search.value.length<1)
    {
     txt_search.value='请输入关键词,如有多个关键语请用*分开';
    }
}