-> selectionStart
<!doctype html>
<html>
<head>
<meta charset = "utf-8">
<script type = "text/javascript">
window.addEventListener ("load", function () {
var input = document.getElementsByTagName ("input");
input[0].addEventListener ("keydown", function () {
alert ("Caret position: " + this.selectionStart);
// You can also set the caret: this.selectionStart = 2;
});
});
</script>
<title>Test</title>
</head>
<body>
<input type = "text">
</body>
</html>
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
