<button class="btn-active">按钮1</button>
<button>按钮2</button>
<button>按钮3</button>
<button>按钮4</button>
<div class="div-active">1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<script type="text/javascript">
//1.先获取元素
var buttonList = document.getElementsByTagName("button");
var divList = document.getElementsByTagName("div");
//2.添加事件
for(var i = 0; i < buttonList.length; i++) {
(function(i){ //匿名函数自执行
buttonList[i].onclick = function() {
for(var j = 0; j < buttonList.length;j++) {
buttonList[j].className = "";
divList[j].className = "";
}
this.className = "btn-active";
divList[i].className = "div-active";
}
})(i)
}
</script>
<button class="btn-active">按钮1</button>
<button>按钮2</button>
<button>按钮3</button>
<button>按钮4</button>
<div class="div-active">1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<script type="text/javascript">
//1.先获取元素
var buttonList = document.getElementsByTagName("button");
var divList = document.getElementsByTagName("div");
//2.添加事件
for(var i = 0; i < buttonList.length; i++) {
buttonList[i].index = i;
buttonList[i].onclick = function() {
for(var j = 0; j < buttonList.length;j++) {
buttonList[j].className = "";
divList[j].className = "";
}
this.className = "btn-active";
divList[this.index].className = "div-active";
}
}
</script>
<button style="background-color: yellow;">1</button>
<button>2</button>
<button>3</button>
<button>4</button>
<div style="display:block;">1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<script type="text/javascript">
var buttonArr = document.getElementsByTagName("button");
var divArr = document.getElementsByTagName("div");
for(var i = 0; i < buttonArr.length;i++) {
buttonArr[i].index = i;
// buttonArr[i].setAttribute("index",i);
buttonArr[i].onclick = function() {
for(var j = 0; j < buttonArr.length; j++) {
buttonArr[j].style.backgroundColor = "#ccc";
buttonArr[this.index].style.backgroundColor = "yellow";
divArr[j].style.display = "none";
divArr[this.index].style.display = "block";
}
}
} </script>
<button style="background-color: yellow;">1</button>
<button>2</button>
<button>3</button>
<button>4</button>
<div style="display:block;">1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<script type="text/javascript">
//定义数组并获取数组内各个的节点
var buttonArr = document.getElementsByTagName("button");
var divArr = document.getElementsByTagName("div");
for(var i = 0; i < buttonArr.length;i++) {
buttonArr[i].onclick = function() {
//this
// alert(this.innerHTML)
//for循环遍历button数组长度
for(var j = 0; j < buttonArr.length; j++) {
//重置所有的button样式
buttonArr[j].style.backgroundColor = "#ccc";
//给当前的(点击的那个)那个button添加样式
this.style.backgroundColor = "yellow";
//隐藏所有的div
divArr[j].style.display = "none";
//判断当前点击是按钮数组中的哪一个？
if(this == buttonArr[j]) {
// alert(j);
//显示点击按钮对应的div
divArr[j].style.display = "block";
}
}
}
}
</script>
<ul id="ul1">
<li class="active">111</li>
<li>222</li>
<li>333</li>
<li>444</li>
</ul>
<script>
window.onload = function (){
var ul1 = document.getElementById('ul1');
var oli = ul1.getElementsByTagName('li');
ul1.onclick = function (e){
var e = e || window.event;
var target = e.target || e.srcElement;
for(var i = 0;i<oli.length;i++){
oli[i].className = '';
}
// e.target目标li
target.className = 'active';
};
};
</script>
