A watermark effect for input boxes.

watermark.js

(function($) {
    $.fn.watermark = function() {

        return this.each(function() {
            var obj = $(this);
            var initialText = obj.val();

            obj.focus(function() {
                if (obj.val() === initialText)
                    obj.val("");
            });

            obj.blur(function() {
                if (obj.val() === "")
                    obj.val(initialText);
            });
        });
    };
})(jQuery);

$(document).ready(function() {
    $('.watermark').watermark();
});