automate a page which was generate some fields by using javascript

Question

i am facing problem in automation, using Htmlunit , a page is generate some value by using javascript , the values a available in inspact element but not in page source code . please give me some suggestion . i am sharing the url where i m facing problem . http://mxtoolbox.com/blacklists.aspx or http://blacklistalert.org/ here i put a ipaddress for checking that is blacklisted or not but unable to automate result,

Answer 1

d.findElement(By.xpath("//div//div//div//input[@id='ctl00_ContentPlaceHolder1_txtToolInput']")).sendKeys("12.2.2.5");d.findElement(By.xpath("//div//div//div//input[@id='ctl00_ContentPlaceHolder1_btnAction']")).click();