css 文件里面有兩個class: one? two? 用js實現(xiàn)表格隔行變色

function changeColor(){

var tabTrs=document.getElementByTagName(’tr’);

var trLength =tabTra.length;

for（var i=0;i<trLength;i++）{

if(trLength%2==0){

tabTrs[i].className=“one”;

}else{

tabTrs[i].className=“two”;

}

//鼠標經(jīng)過顯示的效果

var oldcolor

tabTrs[i].onmouseover=function(){

oldcolor=this.className;

this.className=“over”;

}

tabTrs[i].onmouseOut=function(){

this.className=oldcolor;

}

}

}