function chkmes()
{
    var username=$("#txtusername");
    if($.trim(username.val())=="")
    {
        alert("用户名不能为空！");
        username.focus();
        return false;
    }
    var city=$("#txtcity");
    if($.trim(city.val())=="")
    {
        alert("城市不能为空！");
        city.focus();
        return false;
    }
    var email=$("#txtemail");
    if($.trim(email.val())=="")
    {
        alert("Email不能为空！");
        email.focus();
        return false;
    }
    var content=$("#txtcontent");
    if($.trim(content.val())=="")
    {
        alert("留言内容不能为空！");
        email.focus();
        return false;
    }
}


function sr()
{
    var keywords=$('#txtkeywords');
    window.open("/bookslist.aspx?keywords="+escape(keywords.val())+"");
}