flickr - how can I get yesterdays date in unix format in javascript? -

I'm learning the rest of my own concept and playing with the Flickr API. One of the parameters required by Flickr is min_upload_date , which is formatted in Unix date format and looks like this in the example ...

  & amp; Min_upload_date = 1199145600  

I want to set the day before the present day to min_upload_date , but I do not even know where to start with this The object has got the date () in JavaScript and it has come to know how to set the date of the current date, but how do I change it to a Flickr format?

Thank you in advance for all your help!