(function($){

$(document).ready(function(){

	// set rollover.
	$('img.over, input.over').hover(
		function(){
			this.src = this.src.replace(/^(.+)(\.[a-z]+)$/, '$1_on$2');
		},
		function(){
			this.src = this.src.replace(/^(.+)_on(\.[a-z]+)$/, '$1$2');
		})
		.each(function(){
			this.preloaded = new Image;
			this.preloaded.src = this.src.replace(/^(.+)(\.[a-z]+)$/, '$1_on$2');
		}
	);
	// set ON status.
	$('img.on').each(function(){
		this.src = this.src.replace(/^(.+)(\.[a-z]+)$/, '$1_on$2');
	});

	// open a external links in new window.
	$('a[rel=external]').click(function(){
		window.open(this.href, '_blank');
		return false;
	});

});

})(jQuery);