function copyright(){
myDate = new Date();
myYear = "Copyright (C) Tamagawa Academy & University 1996-"+myDate.getFullYear()+" All rights reserved.";
document.write(myYear);
}

function Rollover(){
     if(document.getElementsByTagName) {  
         var images = document.getElementsByTagName("img");  
         for(var i=0; i < images.length; i++) {  
             if(images[i].getAttribute("src").match("_off."))  
             {  
                 images[i].onmouseover = function() {  
                     this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));  
                 }  
                 images[i].onmouseout = function() {  
                     this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));  
                 }  
             }  
         }  
     }  
 }  
 if(window.addEventListener) {  
     window.addEventListener("load", Rollover, false);  
 }  
 else if(window.attachEvent) {  
     window.attachEvent("onload", Rollover);  
 }