我用了AJAX后，原来对的Response.Write不能用了！
错误提示如下：
Sys.WebForms.PageRequestManagerParserErrorException:The message received from the server count not be parsed.Common causes for this error are when the response is modified by calls to response.Write(),response filters,HttpModules,or server trace is enabled.
Details:Error parsing near ' <script language=jav '.
大家帮帮我吧~~~！
------解决方案--------------------------------------------------------
楼主可以使用这一句
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert1 ", "alert( '请选择联系人! '); ", true);