JavaScript Code:
<script language="javascript">
function validatefun()
{
if (document.getElementById("<%=TextBox1.ClientID%>").value=="")
{
alert("Name cannot be blank!");
document.getElementById("<%=TextBox1.ClientID%>").focus();
return false;
}
if(document.getElementById("<%=TextBox2.ClientID %>").value=="")
{
alert("Email id cannot be blank!");
document.getElementById("<%=TextBox2.ClientID %>").focus();
return false;
}
var Email= /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
var emailid=document.getElementById("<%=TextBox2.ClientID %>").value;
var matchArr= emailid.match(Email);
if (matchArr == null)
{
alert("Your email address are incorrect. So please try Again!");
document.getElementById("<%=TextBox2.ClientID %>").focus();
return false;
}
return true;
}
</script>
HTML Code:
Name: <asp:TextBox ID="TextBox1" runat="server" Width="100px"/>
Email ID: <asp:TextBox ID="TextBox2" runat="server" Width="100px"
ToolTip="Enter Email Id" AutoPostBack="True"/>
<asp:Button ID="BtnSubmit" runat="server" Text="Submit" onclick=" BtnSubmit_Click"
OnClientClick="return validatefun() " />
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