Object Require in JavaScript

[krisssgopi]

Hi Team,

Am using java script in asp.net for input validation. When i run the below program it was throwing an exception Object expected. Please advice me where it was going wrong. Thanks in advance. i have attached the full code for your reference.

<script language="javascript" type="text/javascript">
function check()
{
if(document.getElementById('TextBox1').value=="")
alert("enter username");
}
</script>
<td class='list'><asp:TextBox  CssClass="text" ID="TextBox1" runat="server" ></asp:TextBox></td>

Query.txt

[Christopher Nigro]

Look at the rendered HTML by viewing the source of the page in the browser. Locate your textbox. I am guessing that the ID is not 'TextBox1', correct? If it isn't, you can do one of two things:

1. Use the ID that is generated by the .NET runtime. This isn't the best approach: if the structure of your page changes over time, the ID may also change.

2. Use this in your javascript code:

if(document.getElementById('<%=TextBox1.ClientID%>').value=="") 
 

[krisssgopi]

@Christopher Nigro
Hi Buddy,

i have tried as you mentioned. But still it was throwing the same error. Since am using master page the child page which inherits the master page. It was working fine in normal asp page. The issue was, when am using master page content place holder. Please help me.

[Christopher Nigro]

Please show what you tried. I ran a simple test and it worked for me.