function on1(){
					document.getElementById("top").src="img/m_top-on.jpg";
				}
				function off1(){
					document.getElementById("top").src="img/m_top-m.jpg";
				}

				function on2(){
					document.getElementById("blog").src="img/m_blog-on.jpg";
				}
				function off2(){
					document.getElementById("blog").src="img/m_blog-off.jpg";
				}

				function on3(){
					document.getElementById("bio").src="img/m_bio-on.jpg";
				}
				function off3(){
					document.getElementById("bio").src="img/m_bio-off.jpg";
				}

				function on4(){
					document.getElementById("disco").src="img/m_disco-on.jpg";
				}
				function off4(){
					document.getElementById("disco").src="img/m_disco-off.jpg";
				}

				function on5(){
					document.getElementById("old").src="img/m_old-on.jpg";
				}
				function off5(){
					document.getElementById("old").src="img/m_old-off.jpg";
				}

				function on6(){
					document.getElementById("lesson").src="img/m_lesson-on.jpg";
				}
				function off6(){
					document.getElementById("lesson").src="img/m_lesson-off.jpg";
				}

				function on7(){
					document.getElementById("livespace").src="img/m_livespace-on.jpg";
				}
				function off7(){
					document.getElementById("livespace").src="img/m_livespace-off.jpg";
				}
				
				function on8(){
					document.getElementById("news").src="img/event01-a_on.jpg";
				}
				function off8(){
					document.getElementById("news").src="img/event01-a.jpg";
				}