Preview Window The window.open can be set to create an new browser instance, open in the existing browers, open in a parent frame, or open in a target frame and display HTML within the instance. The window.open method returns a var for which the developer can access its document method to write html string fragments to the brower. In this example,

<script language=javascript>
var sHTML;
sHTML="<h3>Hello World</h3>";
var win = window.open(",",'_blank', 
'toolbar=yes,menubar=yes,titlebar=yes,status=yes,resizeable=yes,scrollbars=yes',true);
win.document.write("" + sHTML + "");

</script>