Question

用js代码怎样给div加onmouseover事件

Answer 1

假设div的id为div1
document.getElementById('div1').onmouseover = function(){
//你的事件处理
}

或者用attachEvent/adEventListener

百度一下http://www.baidu.com/s?tn=firefoxbar_cb&bs=attachEvent%2FadEventListener&f=8&wd=attachEvent

Answer 2

var oDiv=document.getElementById("你的div ID")

oDiv.onmouseover=function(){}
或者
oDiv.addEventListener("mouseover", function(){

});

Answer 3

document.getElementById("divID").onmouseover= function () { alert("a")};