Using document.write() on the Current Window : open « Window « JavaScript Tutorial

<html> 
<head> 
<title>Writing to Same Doc</title> 
<script type="text/javascript"> 
function reWrite() { 


    var newContent = "<html><head><title>title</title></head>"; 
    newContent += "<body bgcolor='aqua'><h1>This document is brand new.</h1>"; 
    newContent += "Click the Back button to see original document."; 
    newContent += "</body></html>"; 
    
    document.write(newContent); 
    document.close(); 


} 
</script> 
</head> 
<body> 
<form> 
<input type="button" value="Replace Content" onclick="reWrite()"> 
</form> 
</body> 
</html>

19.12.open
	19.12.1.	Open new window
	19.12.2.	Popup window with window.open
	19.12.3.	Open new window with 'toolbar=no, status=no, width=200,height=200'
	19.12.4.	Open new window with '_blank' setting
	19.12.5.	Open window in different styles
	19.12.6.	This example pops up a new window and then writes a string to it
	19.12.7.	Using document.write() on the Current Window
	19.12.8.	Using document.write() on Another Window