Javascript is unable to locate the clientid

Encountering an error message like the following:

'System.Web.UI.WebControls.TextBox'
doesn't have a definition for 'ClentID' and there isn't any extension method 'ClentID' that accepts the first argument of type 
'System.Web.UI.WebControls.TextBox'
(may be missing a using directive or an assembly reference?)

Here is the portion of code causing the issue:

 if (document.getElementById("<%=txt_stuname.ClientID %>").value == "") {
        alert("Student Name cannot be blank");
        document.getElementById("<%=txt_stuname.ClentID %>").focus();
        return false;
    }
javascriptasp.netwebforms

Answer №1

Revise ClentID to ClientID 

if (document.getElementById("<%=txt_stuname.ClientID %>").value == "") {
   alert("Student Name must not be left empty");
   document.getElementById("<%=txt_stuname.ClientID %>").focus();
   return false;
}

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