Asp.net Javascript for validations

Question

hi friend iam using javascripts for textbox validations.

<script type="text/javascript" >
        function validations()
        {
        var ar = new Array("--", "=", ";--", "/*", "*/", "@@", "@", ".js", "insert", "delete", "select", ".exe", ".sql", "xp_", "dbcc", "<script>", "script");
        var t = document.getElementById('txtdeptdesc').value;
        var i = ar.length;
        for (var p = 0; p < i; p++)
         {
           if(t == ar[p])
           {
           alert("enter valid username");
           t = "";
           break;
           }
         }

        }
    </script>
<asp:TextBox ID="txtdeptdesc" runat="server" onblur="validations()"></asp:TextBox>

iam writting like this but iam not geeting alert message.

please help me

Ish Bandhu · Answer

Update your javascript, it will work: function validations() { var ar = new Array("--", "=", ";--", "/*", "*/", "@@", "@", ".js", "insert", "delete", "select", ".exe", ".sql", "xp_", "dbcc", " ", "script"); var t = document.getElementById('txtdeptdesc').value; var i = ar.length; for (var p = 0; p if ( t.indexOf(ar[p])!=-1 ) { alert("enter valid username"); t = ""; break; } } }

Vishal Gilbile · Answer

Hello Friend, In asp.net when you are trying to access a server side control in javascript you can't directly access the control through its ID you need to make use of ClientID which is automatically generated by Asp.Net engine for every server side control. That means whenever you have to access a server side control in your javascript you need to make use of the ClientID generated by the Asp.net Engine. just make change in your following line. var t = document.getElementById('txtdeptdesc').value; Replace the above line by below line. var t = document.getElementById(' ').value; Hope that solves your problem. With Regards, Vishal Gilbile.