Insert text to elements like Div, Span, p tags etc.... [Webdriver]

If user want to insert text to elements like Div, Span, p tags etc....
Need to insert  "innerHTML" using javascript+Webdriver


driver.get("http://virtualbuffer.blogspot.in/");
           String jScript = "var myList = document.

getElementsByClassName(\"post-header\");"
                    +"myList[0].innerHTML=\"YourNumber\";";
                JavascriptExecutor executor = (JavascriptExecutor)driver;
                executor.executeScript(jScript);