i realised that elements like facebook like button, google plus button, google anaytics are elemets which quite increase my website load time. It takes alot of time untill element is loaded. My question is:

How to load some element the way that it dont delay, interupt loading of rest of page elements.

Meaning you may notice that if you load alot of elemenets in page header and some element dont respond, it may prevent webpage to load...

So i want to ask how to load an element from the middle of page code without interupting elements loaded after this one?