How to fire Textbox textchanged event while typing in textbox

Question

In my project i am using Textbox inside updatepanel to display the Receipt number which is not already exist in db table. But the textchanged event on the textbox is no

Answer 1

Use this, its working fine

JAVASCRIPT

function ChangeText() {
            var t1 = document.getElementById('<%= txtArticleTitle.ClientID %>');
            var t2 = document.getElementById('<%= txtPageName.ClientID %>');

            t2.value = t1.value;
        }

ASP.NET SOURCE

Article Title:
 


Page Name: