placeholder example

placeholder.js

$(document).ready ->
  $("[placeholder]").focus(->
    input = $(this)
    if input.val() is input.attr("placeholder")
      input.val ""
      input.removeClass "placeholder"

  ).blur(->
    input = $(this)
    if input.val() is "" or input.val() is input.attr("placeholder")
      input.addClass "placeholder"
      input.val input.attr("placeholder")

  ).blur()

  $("[placeholder]").parents("form").submit ->
    $(this).find("[placeholder]").each ->
      input = $(this)
      input.val ""  if input.val() is input.attr("placeholder")