How to convert jQuery to JavaScript? -

i need convert code javascript:

$(function(){   $("#include_header").load("includes/header.html");    $("#include_footer").load("footer.html");  }); 

issue is, beginner javascript , can't figure out how... in javascript? it's jquery.

try sample:

  	         window.addeventlistener('domcontentloaded', function() {    console.log('window - domcontentloaded - capture');     var xhr = new xmlhttprequest();  	//ajax request  	xhr.open('get', 'includes/header.html');  	xhr.onload = function() {  		if (xhr.status === 200) {  			document.getelementbyid('include_header').innerhtml =xhr.responsetext;  		} else {  		   alert('request failed.  returned status of ' + xhr.status);  		}  	};  	xhr.send();    	//second request     var xhr = new xmlhttprequest();  	//ajax request  	xhr.open('get', 'footer.html');  	xhr.onload = function() {  		if (xhr.status === 200) {  			document.getelementbyid('include_footer').innerhtml =xhr.responsetext;  		} else {  		   alert('request failed.  returned status of ' + xhr.status);  		}  	};  	xhr.send();    }, true);