新瓶旧酒ASP.NET AJAX(3) - 客户端脚本编程（调试和跟踪）

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="DebuggingAndTracing.aspx.cs" 
        Inherits="ClientScripting_DebuggingAndTracing" Title="调试和跟踪" %> 

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"> 

        <script type="text/javascript"> 

        function btnAssert_onclick()    
        { 
                var a = 50; 
                 
                Sys.Debug.assert(a > 60, "a的当前值为：“" + a + "”，而我们需要它大于60"); 
                Sys.Debug.assert(a > 60, "a的当前值为：“" + a + "”，而我们需要它大于60", true); 
        } 

        function btnFail_onclick()    
        { 
                var a = 50; 
                 
                if ( a <= 60) 
                { 
                        Sys.Debug.fail("a的当前值为：“" + a + "”，而我们需要它大于60");                
                } 
        } 

        function btnTrace_onclick()    
        { 
                var a = 50; 
                 
                if ( a <= 60) 
                { 
                        Sys.Debug.trace("a的当前值为：“" + a + "”，而我们需要它大于60");                
                } 
        } 

        function btnDump_onclick()    
        { 
                Sys.Debug.traceDump($get('btnDump')); 
                Sys.Debug.traceDump($get('btnDump'), "Name"); 
        } 

        function btnClear_onclick()    
        { 
                Sys.Debug.clearTrace() 
        } 
         
        </script> 

        <p> 
                <input id="btnAssert" type="button" value="Assert测试" btnAssert_ /> 
        </p> 
        <p> 
                <input id="btnFail" type="button" value="Fail测试" btnFail_ /> 
        </p> 
        <p> 
                <input id="btnTrace" type="button" value="Trace测试" btnTrace_ /> 
        </p> 
        <p> 
                <input id="btnDump" type="button" value="TraceDump测试" btnDump_ /> 
        </p> 
        <p> 
                <input id="btnClear" type="button" value="ClearTrace测试" btnClear_ /> 
        </p> 
        <p> 
                <!--id为“TraceConsole”的textarea用于显示Tracing信息--> 
                <textarea id="TraceConsole" style="width: 500px; height: 100px;"></textarea> 
        </p> 
</asp:Content>