小编tek*_*eks的帖子

for(var i=0;i<tr.length;i++){
    var td = tr[i].getElementsByTagName("td");
    if(td[2].innerHTML==time && td[3].innerHTML==cls){
        td[0].setAttribute("id","focus");
        tr[i].style.backgroundColor="green";
        var foc = document.getElementById("focus");
        foc.focus();
        cnt++;
    }
    else{
        tr[i].style.backgroundColor="transparent";
    }

 }