Ajax gameplay on front-end and back-end interactions

<input type= "text" id= "txt1" cols= "+" rows= "3"/>//First set up text to show the back-end parse good data

<center><input type= "button" id= "Button1" value= "Query"/></center>//Create a button to query the database and return data

<script>//Start AJAX Display code
$ ("#button1"). Click (function () {///Get the ID of the button and trigger the function when clicked

$.post ("baojing.php", function (Result) {//$.post ("url (that is, PHP to connect to)", "{(parameter)}", "callback function" {function})

$ ("#txt1"). attr ("value", result);//Using attr is the value returned to the selected Tag value


});



})

This is the entire AJAX content, then in the PHP file with if $ (isset ("#button") {Query the database, parsing what ...} But it's not clear what's been said before, when you click on the post to PHP page!!!

Ajax gameplay on front-end and back-end interactions