<script>
	xmlHttp = new XMLHttpRequest();
	xmlHttp.open('post','xxx.PHP');
	var name = 'zhangSan';
	var age = 20;
	var data = 'name=' + name + '&age=' + age;
	xmlHttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	xmlHttp.onreadystatechange = function (){
		//
	};
<span style="white-space:pre">	</span>xmlHttp.send(data);
</script>