var msgs = new Array;
        
        msgs[0] = "jpeg/miya-kei.jpg";
        msgs[1] = "jpeg/miya-torii.jpg";
        msgs[2] = "gif/tonnbi.gif";
        msgs[3] = "jpeg/yuki01.jpg";
        msgs[4] = "jpeg/tara01.jpg";
        msgs[5] = "jpeg/top06.jpg";
        msgs[6] = "jpeg/top07.jpg";
        msgs[7] = "jpeg/top08.jpg";
        msgs[8] = "jpeg/top09.jpg";
        msgs[9] = "jpeg/top10.jpg";
        msgs[10] = "jpeg/top11.jpg";
function random_img(){
        var i = myrandom(msgs.length) - 1;
        document.write("<IMG SRC=\""+msgs[i]+"\">");
}

function myrandom(max){
        var v = max * Math.random();
        if(v == 0.0){
                v = 1;
        }
        else{
                v = Math.ceil(v);
        }
        return v;
}
<!--画像スクリプトここまで-->

<!--テーブル色入れ替えここから-->
function changeColor(color){
    eventSource=event.srcElement
    if (eventSource.tagName=="TR"||eventSource.tagName=="TABLE"){
        return
    }
    while(eventSource.tagName!="TD"){
        eventSource=eventSource.parentElement
    }
    eventSource.style.backgroundColor=color
}
function restoreColor(color){
    eventSource.style.backgroundColor=color
}
<!--テーブル色入れ替えスクリプトここまで-->