I Have a asp label

<asp:Label ID="lblstarUKRollNo" Visible="false" runat="server" Text="*" CssClass="star"></asp:Label>

and i want to enable it onchange of another textbox which calls a JS, in my javascript i tried

var idlblstarUKRollNo = '<%= lblstarUKRollNo.ClientID %>';
var lblstarUKRollNo = document.getElementById(idlblstarUKRollNo);

and to enable

reqdddlUKJurisdiction.enabled = true; and lblstarUKRollNo.style.display="block";

Both did not work for me. Can anyone help me How to solve this issue.

I Have a asp label

<asp:Label ID="lblstarUKRollNo" Visible="false" runat="server" Text="*" CssClass="star"></asp:Label>

and i want to enable it onchange of another textbox which calls a JS, in my javascript i tried

var idlblstarUKRollNo = '<%= lblstarUKRollNo.ClientID %>';
var lblstarUKRollNo = document.getElementById(idlblstarUKRollNo);

and to enable

reqdddlUKJurisdiction.enabled = true; and lblstarUKRollNo.style.display="block";

Both did not work for me. Can anyone help me How to solve this issue.

• javascript
• asp
• visibility

Share Improve this question Follow asked Apr 2, 2012 at 10:25 IshanIshan 4,0283232 gold badges9595 silver badges157157 bronze badges 1

• 1 Just look what visible actually does msdn.microsoft./en-us/library/… – Sly Commented Apr 2, 2012 at 10:32

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4 Answers 4

Sorted by: Reset to default 4

If you set Visible property to false on a server-control it wont be rendered on the client side at all. So javascript wont be able to find it. Remove Visible property; just use css style "display:none"; later use javascript to change it as "display:block"

Guidance from another question

After adapting to your case:

<asp:Label id="lblstarUKRollNo" style="display: block;" runat="server" Text="*" CssClass="star"/>

Then, you could make it invisible on the client side on Javascript with:

document.getElementById('lblstarUKRollNo').style.display = 'none';

Try using jQuery - $('.someElement').attr('disabled', '');

In addition to what @mshsyayem above has said you have to set the display to none. and you can do it in the code-behind by using the attributes. See below.

lblstarUKRollNo.Attributes.Add("style", "display:none");