<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title></title>
</head>
<body>
<input id="txt" type="text">
鼠标经过选择表单<input id="select" type="text">
</body>
</html>
<script>
var txt = document.getElementById("txt");
var select = document.getElementById("select");
txt.focus();//focus()是一个函数，自动获得焦点
select.onmouseover = function(){
this.select();
}
</script>
<html lang="">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title></title>
</head>
<body>
<input id="txt" type="text">
鼠标经过选择表单<input id="select" type="text">
</body>
</html>
<script>
var txt = document.getElementById("txt");
var select = document.getElementById("select");
txt.focus();//focus()是一个函数，自动获得焦点
select.onmouseover = function(){
this.select();
}
</script>
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