This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Try instead use Since as form will be submit after you click on button, because type is "submit" and don't go though fun1(). If it doesn't work may I suggest you to use jQuery instead pour JS Ajax, it can save lot of time and be crossbrowser solution. For example to your case: