var img=new Array();
	img[0]=new Image(),img[0].src="_img/menu_profile.gif";
	img[1]=new Image(),img[1].src="_img/menu_bbs.gif";
	img[2]=new Image(),img[2].src="_img/menu_blog.gif";
	img[3]=new Image(),img[3].src="_img/menu_mail.gif";
	img[4]=new Image(),img[4].src="_img/menu_link.gif";
	img[5]=new Image(),img[5].src="_img/menu_news.gif";

	var img2=new Array(); 
	img2[0]=new Image(),img2[0].src="_img/menu_profile_b.gif";
	img2[1]=new Image(),img2[1].src="_img/menu_bbs_b.gif";
	img2[2]=new Image(),img2[2].src="_img/menu_blog_b.gif";
	img2[3]=new Image(),img2[3].src="_img/menu_mail_b.gif";
	img2[4]=new Image(),img2[4].src="_img/menu_link_b.gif";
	img2[5]=new Image(),img2[5].src="_img/menu_news_b.gif";


	
	function reset_image(b){
      if ( document.images ){
            document.images["img_"+b].src = img[b].src ;
      }
    }
    function change_image(a){
      if ( document.images ){
             document.images["img_"+a].src = img2[a].src ;
      }
    }
    
	var img_rnd=new Array(	"_img/img_top1.jpg",
							"_img/img_top2.jpg",
							"_img/img_top3.jpg",
							"_img/img_top4.jpg"
	);

	function rnd() {
		document.write('<img src="'+img_rnd[Math.floor(Math.random()*img_rnd.length)]+'">');
	}