服务器控件按钮验证方法

    function checkdata()
            {
                if(document.getElementById("TB_UserName").value=="" )
                {
                    alert("注册帐号不能为空"); 
                    return false;
                }
                
                if(document.getElementById("TB_PassWord").value=="" )
                {
                    alert("用户密码不能为空"); 
                    return false;
                }
                if(document.getElementById("TB_Password2").value=="" )
                {
                    alert("密码确认不能为空"); 
                    return false;
                }
                if(document.getElementById("TB_Password2").value!=document.getElementById("TB_PassWord").value )
                {
                    alert("用户密码与密码确认不一致!"); 
                    return false;
                }
                if(document.getElementById("TB_Name").value=="" )
                {
                    alert("真实姓名不能为空"); 
                    return false;
                }
                
                
                if(document.getElementById("TB_Email").value=="" )
                {
                    alert("电子信箱不能为空"); 
                    return false;
                }
                else
                {
                    //验证电子信箱            
                    
                    var re=/^\w+@\w+\.\w{2,3}/;
                    var str=document.getElementById("TB_Email").value;
                    var r=str.match(re);
                    if(r==null)
                    {
                        alert("邮箱可以帮你找回密码，请认真填写"); 
                        return false;
                    }
                }
                if(document.getElementById("TB_Birthday").value=="" )
                {
                    alert("出生日期不能为空"); 
                    return false;
                }
                else
                {
                    var re=/^\d{4}-\d{1,2}-\d{1,2}$/;
                    var str=document.getElementById("TB_Birthday").value;
                    var r=str.match(re);
                    if(r==null)
                    {
                        alert("注意日期格式：1980-01-01"); 
                         return false;
                    }    
                }
                return true;
            }

function Eventbody() { document.all("Btn_Post").attachEvent('onclick',checkdata) }
这个是body 的 onload=" Eventbody()" 事件
给服务器控件按钮Btn_Post添加一个事件