asp.net - TextBox with Default value -

i want use textbox shows text.

for example : someone@example.com. when user clicks on it, textbox cleared , ready user type.

sample textbox

if working on newer browsers can use placeholder property new in html 5

<asp:textbox id="textbox1" runat="server" placeholder="someone@exmaple.com"></asp:textbox>

otherwise can use onfocus , onblur event described here

Scrio