Check out the attached demos

  1. Change the link displayed in a link control
  2. Change the options of a multi-select list
  3. Change the Text of a Textbox control
  4. Disable/Enable an element
  5. Dynamically change the preselected option of a Radio-Group control
  6. Get text of a Textbox control
  7. Get Text of Textarea control
  8. How to change the text of a paragraph control