I am trying to validate a textbox on a form.  What I want to happen is, if the user leaves this textbox without entering any data,  a tool tip to show as soon as they leave the text and give a message saying this field is required.  I got the validation summary to work after a submit button is clicked but how do I show the tool tip to appear right after the focus leaves the text box.

Thanks,
Stuart

Hi Stuart,

I suggest to use the RadToolTip's client side API in order to achieve the desired behavior. Basically the idea is to do the following:

1. Hook up the submit event which should be the validating one (e.g button click)
2. Check the visibility of the validator - if it is visible then there are validation errors
3. If there are errors, execute a javascript function which references the RadToolTip and shows it.

You can find a working online demo which shows a very similar scenario here.  

Best wishes,
Svetlina
the Telerik team