<label id = "1" onclick="ishow(this);" data-text = "单词的意思" >点击查看</label>
第一种：
<script>
function ishow(obj){
var t = obj.innerHTML;
obj.innerHTML = $(obj).data("text");
$(obj).data("text", t);
}
</script>
第二种：
<script>
function ishow(obj){
var test = obj.getAttribute("data-text");
alert(obj.innerHTML + ";" + test);
obj.setAttribute("data-text", obj.innerHTML);
obj.innerHTML = test;
}
</script>
类似：
<!DOCTYPE html>
<html>
<head>
<script>
function showDetails(animal) {
var animalType = animal.getAttribute("data-animal-type");
alert(animal.innerHTML + ";" + animalType);
animal.setAttribute("data-animal-type", animal.innerHTML);
animal.innerHTML = animalType;
}
</script>
</head>
<body>
<h1>物种</h1>
<p>点击某个物种来查看其类别：</p>
<ul>
<li onclick="showDetails(this)" id="owl" data-animal-type="鸟类">喜鹊</li>
</ul>
</body>
</html>