xxxxxxxxxx<html><head><meta charset="utf-8"><title>W3Cschool教程(w3cschool.cn)</title></head><body><p id="demo">单击按钮显示数组。</p><button onclick="myFunction()">点我</button><script>function myFunction(){ var str="a,b,c,d,e,f"; var n=str.split(","); document.getElementById("demo").innerHTML=n[0];}</script></body></html>