<script type="text/javascript"> ???function fn(){ ???????console.log("test"); ???} ???window.onload=function(){ ???????var btns=document.getElementsByTagName("input"); ???????for(var i = 0;i<btns.length;i++){ ???????????btns[i].index=i; ???????????btns[i].onclick=function(){ ???????????????//alert(btns[i].value); ???????????????alert(this.index); ???????????} ???????} ???}</script><body> ?<input type="button" value="btn1" > ?<input type="button" value="btn2" > ?<input type="button" value="btn3" > ?<input type="button" value="btn4" > ?<input type="button" value="btn5" ></body>js--提高
原文地址：https://www.cnblogs.com/gjack/p/8441082.html