$(function(){
	/*
	-------------------------------- Disable current content's button. */
	var $dir = location.pathname;
	var $base_img_path = '/wp-content/themes/mt_orignal/images/';
	switch($dir){
		case "/": case "/aboutus": case "/business": case "/works": case "/recruit": case "/contacts":
			var $p;
			if($dir == "/"){
				$p = "home";
			}else{
				$p = $dir.substring(1, $dir.length);
			}
			$("li#"+$p+">a").removeAttr('href');
			$("li#"+$p+">a").removeClass('btn');
			$("li#"+$p+">a>img").attr('src',$base_img_path+"btn_"+$p+"_ov.gif");
			break;
	}

	/*
	-------------------------------- Attach auto rollover image. */
	var $img_path;
	var $ro_img_path;
	$("a.btn").mouseover(function(){
			$img_path = $("img", $(this)).attr("src");
			$ro_img_path = $img_path.replace(/(\.[a-zA-Z]+)$/,"_ov$1");
			$("img", $(this)).attr("src", $ro_img_path);
	});
	$("a.btn").mouseout(function(){
			$("img", $(this)).attr("src", $img_path);
	});
});