Cross-Browser Placeholder Support, auch für Passwort Felder im IE, mit Modernizr.

base.js

/* Modernizr load */
Modernizr.load({
  test : Modernizr.input.placeholder,
	nope : './js/ext/placeholderfix.js'
}); 

placeholderfix.js

/* placeholderfix script */
$(function() {
	var input = document.createElement("input");
	if (('placeholder' in input) == false) {
		$('[placeholder]').focus(function() {
			var i = $(this);
			if (i.val() == i.attr('placeholder')) {
				i.val('').removeClass('placeholder');
				if (i.hasClass('password')) {
					i.removeClass('password');
					this.type = 'password';
				}
			}
		}).blur(function() {
			var i = $(this);
			if (i.val() == '' || i.val() == i.attr('placeholder')) {
				if (this.type == 'password') {
					i.addClass('password');
					this.type = 'text';
				}
				i.addClass('placeholder').val(i.attr('placeholder'));
			}
		}).blur().parents('form').submit(function() {
			$(this).find('[placeholder]').each(function() {
				var i = $(this);
				if (i.val() == i.attr('placeholder'))
					i.val('');
			})
		});
	}
});