jQuery Set Cursor Position in Text Area

How do you set the cursor position in a text field using jQuery? I've got a text field with content, and I want the users cursor to be positioned at a certain offset when they focus on the field. The code should look kind of like this:

xcode 4.2.1 - limiting character length in TextField

I have been trying to limit a textField by many codes available out there in the internet but with no luck.

xcode 4 - custom keyboard with two Text Fields

I have created a custom keyboard and I have two text fields. When the user clicks on one of them, the keyboard appears.