javascript 一个文本框输入完毕后自动跳转到下一个文本框的方法


<!DOCTYPE html>
<html>
<head>
<title>js24.html</title>

<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">

<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

<!-- 输入完毕之后光标自动移动到下一个框的方法 -->

<script type="text/javascript">

function moveNext(object,index){

if(object.value.length == 4){

document.forms[0].elements[index+1].focus();
}

}

function showResult(){

var f = document.forms[0];
var result="";

for(var i = 0; i<4 ;i++){

result += f.elements[i].value;
}

alert(result);

}
</script>

</head>

<body onload = "document.forms[0].elements[0].focus();">
<form>
<input type = "text" size = 3 maxlength=4 onkeyup = "moveNext(this,0);">-
<input type = "text" size = 3 maxlength=4 onkeyup = "moveNext(this,1);">-
<input type = "text" size = 3 maxlength=4 onkeyup = "moveNext(this,2);">-
<input type = "text" size = 3 maxlength=4 onkeyup = "moveNext(this,3);"><br>

<input type = "button" value = "显示所有" onclick = "showResult();">
</form>
</body>
</html>


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