007真人开户,重庆到成都动车组最新时刻表,生活大爆炸第二季1
register.aspx页面代码:
<script type="text/javascript">
function checkuser()
{
var option={
parameters:"userid="+$("userid").value,
method:"post",
onsuccess:function(transport){
var rp=transport.responsetext;
if(rp=="true")
{
alert("该用户昵称存在!!");
}
else
{
alert("该用户昵称不存在,请重新输入!!");
}
},
onfailure:function(transport){
alert("数据提交失败,请检查网络或重试。");
}
}
var request=new ajax.request("ajax.aspx?userid="+escape($("userid").value),option);
}
</script>
昵称:<asp:textbox id="userid" runat="server" text="" onblur="checkuser()"></asp:textbox>
ajax.aspx页面代码:
private void page_load(object sender, system.eventargs e)
{
string userid = request.querystring["userid"];
string sql = "select userid from blog_user where userid='" + userid + "')";
object o = dbconn.executescalar(sql);
if (o == null)
response.write("false");
else
response.write("true");
}
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