html验证成功后才能提交到服务器控件h

Question

<asp:Button   ID="Button1"   runat="server"   Height="20px"   OnClick="Button1_Click"  Text="登陆"   Width="38px"  OnClientClick="return document.getElementById("ErrorMessageForUser").innerHTML==""" />

Answer 1

按照你的这个由两个方法
1\再写一个JS，重新调用一下上面两个，记住要加返回值
2\设置一个全局变量，例如：
bool flag=false;
function   EmailCheck()   
        { 
                var   EmailReg   =   /^[-_A-Za-z0-9]+@([_A-Za-z0-9]+\.)+[A-Za-z0-9]{2,3}$/;   
                if(!EmailReg.test(document.getElementById("email_address").value)) 
                { 
                document.getElementById("ErrorMessageForUser").innerHTML="邮箱的格式不正确"; 
                flage=false;
                }else 
                { 
                        document.getElementById("ErrorMessageForUser").innerHTML=""; 
                        flage=true;
                } 
        } 
        //检查密码格式 
        function   PasswordCheck() 
        { 
                var   PasswordReg   =   /^(\w){6,20}$/;   
                if(!PasswordReg.test(document.getElementById("password").value)) 
                { 
                document.getElementById("ErrorMessageForUser").innerHTML="密码为6-30位的字母、数字或下划线"; 
                flage=false;
                }else 
                { 
                        document.getElementById("ErrorMessageForUser").innerHTML=""; 
                         flage=true;
                } 
        } 
function getErr()
{
 return flage;
}
<asp:Button   ID="Button1"   runat="server"   Height="20px"   OnClick="Button1_Click" OnClientClick="return  getErr(); "  Text="登陆"   Width="38px"   /> 

Answer 2

在form上添加onsubmit的验证，也就是提交的时候验证，不通过验证，一定不能提交<script>
function CheckForm(){
 var   EmailReg   =   /^[-_A-Za-z0-9]+@([_A-Za-z0-9]+\.)+[A-Za-z0-9]{2,3}$/;   
                if(!EmailReg.test(document.getElementById("email_address").value)) 
                { 
                document.getElementById("ErrorMessageForUser").innerHTML="邮箱的格式不正确"; 
                return false;
                }else 
                { 
                        document.getElementById("ErrorMessageForUser").innerHTML=""; 
                } 
var   PasswordReg   =   /^(\w){6,20}$/;   
                if(!PasswordReg.test(document.getElementById("password").value)) 
                { 
                document.getElementById("ErrorMessageForUser").innerHTML="密码为6-30位的字母、数字或下划线"; 
                return false;
                }else 
                { 
                        document.getElementById("ErrorMessageForUser").innerHTML=""; 
                } 
return true;
}
</script>
<form onsubmit="return CheckForm()">