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_schedule.gif";
	img[3]=new Image(),img[3].src="_img/menu_blog.gif";
	img[4]=new Image(),img[4].src="_img/menu_disco.gif";
	img[5]=new Image(),img[5].src="_img/menu_link.gif";
	img[6]=new Image(),img[6].src="_img/menu_top.gif";

	var img2=new Array(); 
	img2[0]=new Image(),img2[0].src="_img/menu_profileb.gif";
	img2[1]=new Image(),img2[1].src="_img/menu_bbsb.gif";
	img2[2]=new Image(),img2[2].src="_img/menu_scheduleb.gif";
	img2[3]=new Image(),img2[3].src="_img/menu_blogb.gif";
	img2[4]=new Image(),img2[4].src="_img/menu_discob.gif";
	img2[5]=new Image(),img2[5].src="_img/menu_linkb.gif";
	img2[6]=new Image(),img2[6].src="_img/menu_topb.gif";
	
	
	function reset_image(a){
      if ( document.images ){
            document.images["img_"+a].src = img[a].src ;
      }
    }
    
    function change_image(b){
      if ( document.images ){
             document.images["img_"+b].src = img2[b].src ;
      }
    }