Programmatically trigger modal popup

I want to write a page that checks for a cookie via Javascript and then possibly opens a modal dialog box. How do I trigger the modal popup via client side javascript?

I saw the example that comes on the modal dialog that sample page, however that works with a client side event such as a click. Can I do it without listening for an event?

Hi theregit,

In the javascript where you check the cookie, you can trigger a button.

That button's click event can then be another javascript that opens a modal window.

Trigger the button like:
var myButton = document.getElementById('myButton');
myButton.click();

Is this an answer to your question?
if you have comments/remarks/questions .. please do so!

Kind regards
Wim

Try this ,

Show and Hide ModalPopupExtender from JavaScript

Hope this helps

Phanatic,

Thank you sooo much for that post. I was having the problem with the 'null' is null or not an object error. Once I used the pageLoad() method it worked great.