Watermark for jQuery

jquery.watermark.js

(function($) {
	$.fn.watermark = function() {
		return this.each(function() {
			this._watermark_base = this.value;
			
			$(this).focus(function() {
				if (this._watermark_base == this.value) {
					this.value = '';
				}
			});
			
			$(this).blur(function() {
				if (this.value == '') {
					this.value = this._watermark_base;
				}
			});
		});
	};
})(jQuery);