I'm using the following 2 lines of JS to create a UID:

var UID = dateobj.getTime();
UID = String(UID).substr(4);

It appears that sometimes it generates a number like:
564929300
other times like:
56492930

Problem is the length isn't consistent which is messing things up. Any ideas how that's possible and if there is a way to fix this or a better way to make a UID with JS?

Thanks

I'm using the following 2 lines of JS to create a UID:

var UID = dateobj.getTime();
UID = String(UID).substr(4);

It appears that sometimes it generates a number like:
564929300
other times like:
56492930

Problem is the length isn't consistent which is messing things up. Any ideas how that's possible and if there is a way to fix this or a better way to make a UID with JS?

Thanks

• javascript
• uuid

• what date range are you dealing with? – meder omuraliev Commented Jul 13, 2010 at 23:30

2 Answers 2

I like doing Math.random().toString(36).substr(2,9)

There one implementation here: http://blog.shkedy./2007/01/createing-guids-with-client-side.html

Here it is in action: http://jsfiddle/7sXL6/

I threw together a smaller version of it: http://jsfiddle/7sXL6/4/