<!DOCTYPE html><html><head><meta charset="utf-8"><title>菜鸟教程()</title><script>function myFunction(){var x=document.getElementsByName("fname");console.log(x.length);for(var i=0; i< x.length;i++){if(x[i]==document.activeElement){// alert('获取焦点元素为:' + i + ' 具体值为:' + x[i].value);if(i < x.length-1) {x[i+1].focus();return;}}}}</script></head><body><div id="content"><input type="text" name="fname" onkeyup="myFunction()"><input type="text" name="fname" onkeyup="myFunction()"><input type="text" name="fname" onkeyup="myFunction()"><input type="text" name="fname" onkeyup="myFunction()"></div></body></html>
