My defaultify function using defaultValue and not a data- attribute

defaultify.js

	/**
	 * defaultify gets any INPUTs classed with .defaultify and causes them to "empty" onFocus and
	 * repopulate the default onBlur. This uses the HTML4 built-in `defaultValue` property (see
	 * https://developer.mozilla.org/en-US/docs/DOM/HTMLInputElement
	 *
	 * @returns nothing
	 * @requires jQuery
	 * @author KPM
	 */
	defaultify: function() {
		$j('input.defaultify')
			.focus( function(){
				if ( this.value === this.defaultValue ) {
					this.value = '';
				}
			})
			.blur( function(){
				if ( this.value === '' ) {
					this.value = this.defaultValue;
				}
			});
	}