How to remove part of a string before a ":" in javascript?

If I have a string Abc: Lorem ipsum sit amet, how can I use JavaScript/jQuery to remove the string before the : including the :. For example the above string will become: Lorem ipsum sit amet.

There is no need for jQuery here, regular JavaScript will do:

var str = "Abc: Lorem ipsum sit amet";
str = str.substring(str.indexOf(":") + 1);

Or, the .split() and .pop() version:

var str = "Abc: Lorem ipsum sit amet";
str = str.split(":").pop();

Or, the regex version (several variants of this):

var str = "Abc: Lorem ipsum sit amet";
str = /:(.+)/.exec(str)[1];

As a follow up to Nick's answer If your string contains multiple occurrences of : and you wish to only remove the substring before the first occurrence, then this is the method:

var str = "Abc:Lorem:ipsum:sit:amet";
arr = str.split(":");
arr.shift();
str = arr.join(":");
// str = "Lorem:ipsum:sit:amet"