how to set focus to text box?

[sai_abhiram]

i am learning .net. In asp.net i run a web form that has a username and password field. If i press submit button without entering the username the focus must go back to the username textbox and show a message that i have not entered a username.

pl help me,

sai abhiram bandhakavi.

[mendhak]

Use client side validation (javascript). Check for the value entered in the textbox, if it's "", then use the .focus() method on it, and return false to the submit button.