I am getting error " microsoft jscript runtime error 'undefined' is null or not an object" when i call clent script code from code behind in page load event. ( I shoul open the radwindow on page load). Please see my code below.
RadControls for ASP.NET AJAX, being MS AJAX objects, are rendered after
page is loaded (e.g. after window.onload is fired). Therefore executing
code in the
window.onload event doesn't ensure that the RadWindowManager is already rendered on the page and you need to add a Sys.Application.Load handler.
Thanks for your help. Now radwindow is opening only once on page load. I mean i have two tab button ( tab1 and tab2) on my master page. Lets say i have home.aspx. On top of the page, i am displaying two tab button. On each tab click, event i am redirecting to the same page(Home.aspx). This is what my requirement. What is happening now, by default, i selected tab1. on page load rad window is opening. When i click on tab2, i am actually redireting to the same page. this time radwindow is not opening. Is there any setting? I have tried putting VisibleOnPageLoad = true also.