AJAX TextBoxWaterMark extender control provides the functionality to display the instruction or hepl message inside the textbox control like a watermark that disappears when user sets focus in it and appears back if user leaves the textbox blank after losing the focus from that textbox. You can use CSS styles to customize the appearance of watermark message displayed using AJAX textbox watermark control.
Properties of AJAX TextBoxWaterMark Control
You can learn the use of above properties from the tutorial of AJAX TextboxWaterMark control by following the link provided at the bottom of this sample.
Try the sample below to understand the functionality of AJAX TextboxWaterMark control.