Menshakovich,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(function() {
$("#add").click(function() {
var block = $('<div class="string"><input name="one"><input name="two"></div>').appendTo("#here");
var del = $('<div name="delete" >×</div>').appendTo("#here");
del.click(function() {
del.add(block).remove()
})
})
});
</script>
</head>
<body>
<div id="here"><div class="string">
<input name="one">
<input name="two">
</div></div>
<span id="add">ADD</span>
</body>
</html>