Javascript regular expression URL alteration

Question

I have a URL like /admin/editblogentry?page=3&color=blue

I want to alter the 'page' in the url to 1 so that the url becomes

/admin/editblogentry?page=1&color=blue

What is the best way to accomplish this using javascript?

Answer 1

var s="/admin/editblogentry?page=3&color=blue"
var re=/(.*page=)(\d+)(&.*)*/
s.replace(re,"$11$3")

Answer 2

Assuming that the URL contains only one number (i.e. the page numbers), this is the simplest regex:

"/admin/editblogentry?page=3&color=blue".replace(/\d+/, 10001)