function add() {
var new_chq_no = parseInt($('#total_chq').val()) + 1;
var new_input = "<input type='text' id='new_" + new_chq_no + "'>";
$('#new_chq').html(new_input);
}
function remove() {
var last_chq_no = $('#total_chq').val();
if (last_chq_no > 1) {
$('#new_' + last_chq_no).append('');
$('#total_chq').val(last_chq_no - 1);
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text">
<button onclick="add()">Add</button>
<button onclick="remove()">remove</button>
<div id="new_chq"></div>
<input type="hidden" value="1" id="total_chq">
它只添加了一次输入字段,第二次点击时没有添加任何内容,删除按钮也无法使用。