js request php does not jump

#js can use AJAX technology to request php without jumping.

What is AJAX?

Ajax stands for "Asynchronous Javascript And XML" (asynchronous JavaScript and XML), which refers to a web development technology for creating interactive web applications.

Ajax is a technology for creating fast, dynamic web pages that can update parts of a web page without reloading the entire web page.

Ajax allows web pages to be updated asynchronously by exchanging a small amount of data with the server in the background. This means that parts of a web page can be updated without reloading the entire page.

js request php example:

<input type="text" id="textarea1">
<button id="sub">提交</button>

// 引入jQuery.js库文件，jQuery为我们封装好了ajax请求的方法，不需要自己写
<script type="text/javascript" src="jquery.js"></script>
<script>
	$(document).ready(function(){
		$(&#39;#sub&#39;).click(function(){
			var val=$(&#39;textarea1&#39;).val();
			$.post(&#39;savexml.php&#39;,{"val":val},function(data){
				json = eval("(" + data + ")");
				if(json.status==1){//提交ajax请求成功
				//处理
				}else{//失败
				//处理
			}
		});
		},&#39;json&#39;);
	});
</script>

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