Set asp.net textbox value using javascript

asp.net, javascript

Solution

Solution 1:

Make that textbox as visible=true and try,

When you make a control as visible false, that control will not be loaded in client side and as you knew javascript will be executed on client side itself.

Solution 2:

Add this javascript at the end of the page.

Problem

I want to set the value of a asp.net textbox using javascript My JS Code is: ``` document.getElementById('<%=txtFlag.ClientID %>').value = "Track"; ``` My textbox is: ``` <asp:TextBox ID="txtFlag" runat="server" Visible="False"></asp:TextBox> ``` But it gives me an error `document.getElementById(...)' is null or not an object` I dont understand what is wrong. Please help.

Original source