placeholder.js used jQuery support password type input

placeholder.js

$(function () {
    "use strict";
    var placeholderColor = "#999999";

    var addTextFieldPlaceholderSupport = function (elem, text) {
        var e = $(elem);
        if (!e.val())
            e.val(text).data("textColor", e.css("color")).css("color", placeholderColor);
        e.focus(function () {
            if (e.val() == text)
                e.val("").removeClass("placeholder").css("color", e.data("textColor"))
        }).blur(function () {
            if (!e.val())
                e.val(text).addClass("placeholder").css("color", placeholderColor)
        }).closest("form").submit(function () {
            if (e.val() == e.prop("placeholder"))
                e.val("")
        });
    };

    var addPasswordFieldPlaceholderSupport = function (elem, text) {
        var e = $(elem);
        var cover = $(document.createElement("div"));
        e.parent().css("position", "relative").append(cover.text(text));
        cover.css({
            "height": e.css("height"),
            "line-height": e.css("height"),
            "width": e.css("width"),
            "position": "absolute",
            "text-align": e.css("text-align"),
            "padding-left": e.css("padding-left"),
            "color": placeholderColor,
            "top": e[0].offsetTop,
            "left": e[0].offsetLeft
        }).on("click", function () {
            $(this).hide();
        });

        e.focus(function () {
            cover.hide()
        }).blur(function () {
            if (!e.val())
                cover.show()
        });
    };

    if (!("placeholder" in document.createElement("input"))) {
        $("input[placeholder], textarea[placeholder]").each(function () {
            var text = this.getAttribute("placeholder");
            if (!text) return;
            if (this.type == "password") {
                addPasswordFieldPlaceholderSupport(this, text)
            } else {
                addTextFieldPlaceholderSupport(this, text)
            }
        })
    }

});