function checkone(){ var j=document.getElementById("wb").value; var hobby = document.getElementById("hobby"+j); hobby.checked = true; }

源自：9-4 区别getElementByID,getElementsByName,getElementsByTagName

function checkone(){

var j=document.getElementById("wb").value;

var hobby = document.getElementById("hobby"+j);

hobby.checked = true; }

关键这一句看不懂啊 var hobby = document.getElementById("hobby"+j); 求大神指教

提问者：好孩子001 2016-05-19 13:43