HTML5 Placeholder Fallback with Modernizr

placeholder.coffee

#######################
# HTML5 Placeholder fallback
#######################
# http://webdesignerwall.com/tutorials/cross-browser-html5-placeholder-text
unless Modernizr.input.placeholder
    $("[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")