<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="outer">
<div class="item">
<input type="button" value="+" onclick="fun1(this)">
<input type="text">
</div>
<div class="item">
<input type="button" value="-" onclick="fun1(this)">
<input type="text">
</div>
</div>
<script src="jquery-3.1.1.js"></script>
<script>
function fun1(self) {
var Clone=$(self).parent().clone();
//Clone.children(":button").val("-").attr("onclick","func2(this)");
$("#outer").append(Clone)
}
function func2(self) {
alert(123)
$(self).parent().remove()
}
</script>
</body>
</html>