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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<form>
<input type="text" TabIndex="1"/>
<input type="text" TabIndex="2"/>
<input type="text" TabIndex="3"/>
</form>
<script>
var tabIndex=0;
var maxIndex=3;
var tabKeyCode=13;
var inputObjs = document.getElementsByTagName("input");
document.onkeyup = function(e){
if(e.keyCode===tabKeyCode)
{
(tabIndex<1||tabIndex>=maxIndex)?tabIndex=1:tabIndex++;
for(i=0;i<inputObjs.length;i++)
{
var thisTabIndex=Number(inputObjs[i].getAttribute("TabIndex"));
if(thisTabIndex===tabIndex)
{
inputObjs[i].focus();break;
}
}
}
}
</script>
</body>
</html>
如果外层有form和submit的话,你还要想办法解决回车自动提交的问题