$(document).ready(function(){
$(document).on("click", "button", function() {
var name = $('#ip1').val();
var type = $('#ip2').val();
var des = $('#ip3').val();
var he = $('#ip4').val();
var tr = "<tr><td>" + name + "</td><td>" + type + "</td><td>" + des+ "</td><td>" + he + "</td></tr>";
$("tbody").append(tr);
});
});
你写的js有问题,引入jquery库,这样试试