测试
2017-09-26 00:44:09 -0400
<html>
<body>
<button onclick="myFunction()"><span id="demo">Try</span></button>
<p id="result"></p>
<script>
//天珩
var a=new Array()
a[0]="恭喜你中獎了"
a[1]="再來一次"
a[2]="很遺憾未中獎"
function myFunction(){
document.getElementById("demo").innerHTML="Again"
document.getElementById("result").innerHTML=a[Math.floor(Math.random()*3)]}
</script>
</body>
</html>