This is the code from .aspx file
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Login Again</title>
<script type="text/javascript">
function Validate() {
if (document.getElementById("txtLogin").value == "") {
alert("Enter login name.");
}
if (document.getElementById("<%=txtLogin.ClientID%>").value == "") {
alert("Enter login name.");
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="txtLogin" runat="server"></asp:TextBox>
<asp:Button ID="btnSubmit" runat="server" Text="Login" OnClientClick="Validate()" />
</form>
</body>
</html>
In function Validate() I can access textbox using Id of control i.e.;
getElementById("txtLogin")so should I use the second approach which is accessing control throughcontrol.ClientIDand why?My first understanding was that to access server control I have to use this syntax
<%= %>but now I come to know from this example that I can access server side control simply throughgetElementById("ID-of-control").