date in calling form xml

Suite and Optimus Suite 5
#1

Many times I see this method to attach an xml to a form or tab:

menu.loadXML("../common/dhxmenu.xml?etc=" + new Date().getTime()

I don’t understand why you need the date and time to do that and what the etc variable does?
Can someone explain?
Thanks

#2

Adding new date as parameter make browser think that there is a new request performed, this helps to prevent xml caching in different browsers.

#3

Thanks for the clarification.

#4

You are welcome!